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Shin-ichi Ohtani

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space physicist
240-228-3641
  • B.Sc, Geophysics
    1984, University of Tokyo
  • M.Sc, Geophysics
    1986, University of Tokyo
  • PhD, Geophysics
    1989, University of Tokyo

Dr. Ohtani is a space scientist, who has been making significant contributions in various areas of magnetospheric physics including magnetosphere-ionosphere coupling, substorms, magnetotail dynamics, storm-time ring current, solar wind-magnetosphere, and ULF waves. He has over 200+ peer-reviewed publications.

Scholarly Publications

External and Internal Causes of the Stormtime Intensification of the Dawnside Westward Auroral Electrojet

Journal of Geophysical Research: Space Physics, 2023
S. Ohtani, K. Sorathia, V. G. Merkin, H. U. Frey, J. W. Gjerloev, (2023), External and Internal Causes of the Stormtime Intensification of the Dawnside Westward Auroral Electrojet, Journal of Geophysical Research: Space Physics

Effect of Meteoric Ions on Ionospheric Conductance at Jupiter

Journal of Geophysical Research: Space Physics, 2022
Yuki Nakamura, Koichiro Terada, Chihiro Tao, Naoki Terada, Yasumasa Kasaba, Francois Leblanc, Hajime Kita, Aoi Nakamizo, Akimasa Yoshikawa, Shinichi Ohtani, Fuminori Tsuchiya, Masato Kagitani, Takeshi Sakanoi, Go Murakami, Kazuo Yoshioka, Tomoki Kimura, Atsushi Yamazaki, Ichiro Yoshikawa, (2022), Effect of Meteoric Ions on Ionospheric Conductance at Jupiter, Journal of Geophysical Research: Space Physics

New Insights Into the Substorm Initiation Sequence From the Spatio-Temporal Development of Auroral Electrojets

Journal of Geophysical Research: Space Physics, 2022
S. Ohtani, T. Motoba, J. W. Gjerloev, H. U. Frey, I. R. Mann, P. J. Chi, H. Korth, (2022), New Insights Into the Substorm Initiation Sequence From the Spatio-Temporal Development of Auroral Electrojets, Journal of Geophysical Research: Space Physics

New Insights From the 2003 Halloween Storm Into the Colaba 1600 nT Magnetic Depression During the 1859 Carrington Storm

Journal of Geophysical Research: Space Physics, 2022
Shinichi Ohtani, (2022), New Insights From the 2003 Halloween Storm Into the Colaba 1600 nT Magnetic Depression During the 1859 Carrington Storm, Journal of Geophysical Research: Space Physics

Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 3. Occurrence and Amplitude as Functions of Magnetic Latitude, Local Time, and Magnetic Disturbance Indices

Space Weather, 2021
Mark J. Engebretson, Viacheslav A. Pilipenko, Erik S. Steinmetz, Mark B. Moldwin, Martin G. Connors, David H. Boteler, Howard J. Singer, Hermann Opgenoorth, Audrey Schillings, Shin Ohtani, Jesper Gjerloev, Christopher T. Russell, (2021), Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 3. Occurrence and Amplitude as Functions of Magnetic Latitude, Local Time, and Magnetic Disturbance Indices, Space Weather

Globally Correlated Ground Magnetic Disturbances During Substorms

Journal of Geophysical Research: Space Physics, 2021
Shinichi Ohtani, Shun Imajo, Aoi Nakamizo, Jesper W. Gjerloev, (2021), Globally Correlated Ground Magnetic Disturbances During Substorms, Journal of Geophysical Research: Space Physics

Simultaneous Development of Multiple Auroral Substorms: Double Auroral Bulge Formation

Journal of Geophysical Research: Space Physics, 2021
S. Ohtani, J. W. Gjerloev, K. A. McWilliams, J. M. Ruohoniemi, H. U. Frey, (2021), Simultaneous Development of Multiple Auroral Substorms: Double Auroral Bulge Formation, Journal of Geophysical Research: Space Physics

Revisiting the Partial Ring Current Model: Longitudinal Asymmetry of Ground Magnetic Depression During Geomagnetic Storms

2021

Superposed Epoch Analysis of Nighttime Magnetic Perturbation Events Observed in Arctic Canada

Journal of Geophysical Research: Space Physics, 2021
Mark J. Engebretson, Lidiya Y. Ahmed, Viacheslav A. Pilipenko, Erik S. Steinmetz, Mark B. Moldwin, Martin G. Connors, David H. Boteler, James M. Weygand, Shane Coyle, Shin Ohtani, Jesper Gjerloev, Christopher T. Russell, (2021), Superposed Epoch Analysis of Nighttime Magnetic Perturbation Events Observed in Arctic Canada, Journal of Geophysical Research: Space Physics

SECS Analysis of Nighttime Magnetic Perturbation Events Observed in Arctic Canada

Journal of Geophysical Research: Space Physics, 2021
James M. Weygand, Mark J. Engebretson, Viacheslav A. Pilipenko, Erik S. Steinmetz, Mark B. Moldwin, Martin G. Connors, Yukitoshi Nishimura, Larry R. Lyons, Christopher T. Russell, Shin-Ichi Ohtani, Jesper Gjerloev, (2021), SECS Analysis of Nighttime Magnetic Perturbation Events Observed in Arctic Canada, Journal of Geophysical Research: Space Physics

Superposed Epoch Analysis of Dispersionless Particle Injections Inside Geosynchronous Orbit

Journal of Geophysical Research: Space Physics, 2021
T. Motoba, S. Ohtani, M. Gkioulidou, A. Y. Ukhorskiy, L. J. Lanzerotti, S. G. Claudepierre, (2021), Superposed Epoch Analysis of Dispersionless Particle Injections Inside Geosynchronous Orbit, Journal of Geophysical Research: Space Physics

Formation of a 3‐D Oscillatory Current System Associated With Global High‐Correlation Pi 2 Event: A Case Study

Journal of Geophysical Research: Space Physics, 2020
, (2020), Formation of a 3‐D Oscillatory Current System Associated With Global High‐Correlation Pi 2 Event: A Case Study, Journal of Geophysical Research: Space Physics

Pitch Angle Dependence of Electron and Ion Flux Changes During Local Magnetic Dipolarization Inside Geosynchronous Orbit

Journal of Geophysical Research: Space Physics, 2020
T. Motoba, S. Ohtani, M. Gkioulidou, D. G. Mitchell, A. Y. Ukhorskiy, K. Takahashi, L. J. Lanzerotti, G. Claudepierre, H. E. Spence, G. D. Reeves, (2020), Pitch Angle Dependence of Electron and Ion Flux Changes During Local Magnetic Dipolarization Inside Geosynchronous Orbit, Journal of Geophysical Research: Space Physics

Ballooning-Interchange Instability in the Near-Earth Plasma Sheet and Auroral Beads: Global Magnetospheric Modeling at the Limit of the MHD Approximation

Geophysical Research Letters, 2020
K. A. Sorathia, V. G. Merkin, E. Panov, B. Zhang, J. G. Lyon, J. Garretson, A. Y. Ukhorskiy, S. Ohtani, M. Sitnov, M. Wiltberger, (2020), Ballooning-Interchange Instability in the Near-Earth Plasma Sheet and Auroral Beads: Global Magnetospheric Modeling at the Limit of the MHD Approximation, Geophysical Research Letters

Is the Substorm Current Wedge an Ensemble of Wedgelets?: Revisit to Midlatitude Positive Bays

Journal of Geophysical Research: Space Physics, 2020
Shinichi Ohtani, Jesper W. Gjerloev, (2020), Is the Substorm Current Wedge an Ensemble of Wedgelets?: Revisit to Midlatitude Positive Bays, Journal of Geophysical Research: Space Physics

Generalized Substorm Current Wedge Model: Two Types of Dipolarizations in the Inner Magnetosphere

Journal of Geophysical Research: Space Physics, 2020
S. Ohtani, T. Motoba, K. Takahashi, S. Califf, (2020), Generalized Substorm Current Wedge Model: Two Types of Dipolarizations in the Inner Magnetosphere, Journal of Geophysical Research: Space Physics

Dynamic Properties of Particle Injections Inside Geosynchronous Orbit: A Multisatellite Case Study

Journal of Geophysical Research: Space Physics, 2020
T. Motoba, S. Ohtani, S. G. Claudepierre, G. D. Reeves, A. Y. Ukhorskiy, L. J. Lanzerotti, (2020), Dynamic Properties of Particle Injections Inside Geosynchronous Orbit: A Multisatellite Case Study, Journal of Geophysical Research: Space Physics

Global Empirical Picture of Magnetospheric Substorms Inferred From Multimission Magnetometer Data

Journal of Geophysical Research: Space Physics, 2019
, (2019), Global Empirical Picture of Magnetospheric Substorms Inferred From Multimission Magnetometer Data, Journal of Geophysical Research: Space Physics

Signatures of Nonideal Plasma Evolution During Substorms Obtained by Mining Multimission Magnetometer Data

Journal of Geophysical Research: Space Physics, 2019
, (2019), Signatures of Nonideal Plasma Evolution During Substorms Obtained by Mining Multimission Magnetometer Data, Journal of Geophysical Research: Space Physics

Substorm Energy Transport From the Magnetotail to the Nightside Ionosphere

Journal of Geophysical Research: Space Physics, 2019
, (2019), Substorm Energy Transport From the Magnetotail to the Nightside Ionosphere, Journal of Geophysical Research: Space Physics

Solar Illumination Dependence of the Auroral Electrojet Intensity: Interplay Between the Solar Zenith Angle and Dipole Tilt

Journal of Geophysical Research: Space Physics, 2019
, (2019), Solar Illumination Dependence of the Auroral Electrojet Intensity: Interplay Between the Solar Zenith Angle and Dipole Tilt, Journal of Geophysical Research: Space Physics

Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 2. Multiple‐Instrument Observations

Journal of Geophysical Research: Space Physics, 2019
, (2019), Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 2. Multiple‐Instrument Observations, Journal of Geophysical Research: Space Physics

Low‐Energy (<keV) O + Ion Outflow Directly Into the Inner Magnetosphere: Van Allen Probes Observations

Journal of Geophysical Research: Space Physics, 2019
, (2019), Low‐Energy (

Dawnside Wedge Current System Formed During Intense Geomagnetic Storms

Journal of Geophysical Research-Space Physics, 2018
S. Ohtani, J. W. Gjerloev, B. J. Anderson, R. Kataoka, O. Troshichev, S. Watari, (2018), Dawnside Wedge Current System Formed During Intense Geomagnetic Storms, Journal of Geophysical Research-Space Physics, 123, 11, 9093-9109

Longitudinal Development of Poleward Boundary Intensifications (PBIs) of Auroral Emission

Journal of Geophysical Research-Space Physics, 2018
S. Ohtani, T. Motoba, J. W. Gjerloev, J. M. Ruohoniemi, E. F. Donovan, A. Yoshikawa, (2018), Longitudinal Development of Poleward Boundary Intensifications (PBIs) of Auroral Emission, Journal of Geophysical Research-Space Physics, 123, 11, 9005-9021

Nightside Magnetosphere-Ionosphere Current Circuit: Implications for Auroral Streamers and Pi2 Pulsations

Journal of Geophysical Research-Space Physics, 2018
S. Ohtani, T. Uozumi, (2018), Nightside Magnetosphere-Ionosphere Current Circuit: Implications for Auroral Streamers and Pi2 Pulsations, Journal of Geophysical Research-Space Physics, 123, 1, 350-363

Response of Different Ion Species to Local Magnetic Dipolarization Inside Geosynchronous Orbit

Journal of Geophysical Research-Space Physics, 2018
T. Motoba, S. Ohtani, M. Gkioulidou, A. Y. Ukhorskiy, D. G. Mitchell, K. Takahashi, L. J. Lanzerotti, C. A. Kletzing, H. E. Spence, J. R. Wygant, (2018), Response of Different Ion Species to Local Magnetic Dipolarization Inside Geosynchronous Orbit, Journal of Geophysical Research-Space Physics, 123, 7, 5420-5434

Spatial Development of the Dipolarization Region in the Inner Magnetosphere

Journal of Geophysical Research-Space Physics, 2018
S. Ohtani, T. Motoba, M. Gkioulidou, K. Takahashi, H. J. Singer, (2018), Spatial Development of the Dipolarization Region in the Inner Magnetosphere, Journal of Geophysical Research-Space Physics, 123, 7, 5452-5463

Application of a global magnetospheric-ionospheric current model for dayside and terminator Pi2 pulsations

Journal of Geophysical Research-Space Physics, 2017
S. Imajo, A. Yoshikawa, T. Uozumi, Shin. Ohtani, A. Nakamizo, P. J. Chi, (2017), Application of a global magnetospheric-ionospheric current model for dayside and terminator Pi2 pulsations, Journal of Geophysical Research-Space Physics, 122, 8, 8589-8603

Dominance of high-energy (> 150keV) heavy ion intensities in Earth's middle to outer magnetosphere

Journal of Geophysical Research-Space Physics, 2017
Ian J. Cohen, Donald G. Mitchell, Lynn M. Kistler, Barry H. Mauk, Brian J. Anderson, Joseph H. Westlake, Shinichi Ohtani, Douglas C. Hamilton, Drew L. Turner, J. Bernard Blake, Joseph F. Fennell, Allison N. Jaynes, Trevor W. Leonard, Andrew J. Gerrard, Louis J. Lanzerotti, Robert C. Allen, James L. Burch, (2017), Dominance of high-energy (> 150keV) heavy ion intensities in Earth's middle to outer magnetosphere, Journal of Geophysical Research-Space Physics, 122, 9, 9282-9293

Equatorial magnetic field of the near-Earth magnetotail

Journal of Geophysical Research-Space Physics, 2017
S. Ohtani, T. Motoba, (2017), Equatorial magnetic field of the near-Earth magnetotail, Journal of Geophysical Research-Space Physics, 122, 8, 8462-8478

Initial deflection of middle-latitude Pi2 pulsations in the premidnight sector: Remote detection of oscillatory upward field-aligned current at substorm onset

Journal of Geophysical Research-Space Physics, 2016
Teiji Uozumi, A. Yoshikawa, S. Ohtani, S. Imajo, D. G. Baishev, A. V. Moiseev, K. Yumoto, (2016), Initial deflection of middle-latitude Pi2 pulsations in the premidnight sector: Remote detection of oscillatory upward field-aligned current at substorm onset, Journal of Geophysical Research-Space Physics, 121, 7, 6324-6340

Solar terminator effects on middle-to low-latitude Pi2 pulsations

Earth Planets and Space, 2016
Shun Imajo, Akimasa Yoshikawa, Teiji Uozumi, Shinichi Ohtani, Aoi Nakamizo, Sodnomsambuu Demberel, Boris Mikhailovich Shevtsov, (2016), Solar terminator effects on middle-to low-latitude Pi2 pulsations, Earth Planets and Space, 68

The Harang reversal and the interchange stability of the magnetotail

Journal of Geophysical Research-Space Physics, 2016
Shinichi Ohtani, Matina Gkioulidou, Chih-Ping Wang, Richard A. Wolf, (2016), The Harang reversal and the interchange stability of the magnetotail, Journal of Geophysical Research-Space Physics, 121, 4, 3278-3292

The impact of sunlight on high-latitude equivalent currents

Journal of Geophysical Research-Space Physics, 2016
K. M. Laundal, J. W. Gjerloev, N. Ostgaard, J. P. Reistad, S. Haaland, K. Snekvik, P. Tenfjord, S. Ohtani, S. E. Milan, (2016), The impact of sunlight on high-latitude equivalent currents, Journal of Geophysical Research-Space Physics, 121, 3, 2715-2726

The initiation of the poleward boundary intensification of auroral emission by fast polar cap flows: A new interpretation based on ionospheric polarization

Journal of Geophysical Research-Space Physics, 2016
S. Ohtani, A. Yoshikawa, (2016), The initiation of the poleward boundary intensification of auroral emission by fast polar cap flows: A new interpretation based on ionospheric polarization, Journal of Geophysical Research-Space Physics, 121, 11, 10910-10928

The initiation of the poleward boundary intensification of auroral emission by fast polar cap flows: A new interpretation based on ionospheric polarization

Journal of Geophysical Research: Space Physics, 2016
S. Ohtani, A. Yoshikawa, (2016), The initiation of the poleward boundary intensification of auroral emission by fast polar cap flows: A new interpretation based on ionospheric polarization, Journal of Geophysical Research: Space Physics

Void structure of O+ ions in the inner magnetosphere observed by the Van Allen Probes

Journal of Geophysical Research: Space Physics, 2016
Y. Nakayama, Y. Ebihara, S. Ohtani, M. Gkioulidou, K. Takahashi, L. M. Kistler, T. Tanaka, (2016), Void structure of O+ ions in the inner magnetosphere observed by the Van Allen Probes, Journal of Geophysical Research: Space Physics

Birkeland current effects on high-latitude ground magnetic field perturbations

Geophysical Research Letters, 2015
K. M. Laundal, S. E. Haaland, N. Lehtinen, J. W. Gjerloev, N. Ostgaard, P. Tenfjord, J. P. Reistad, K. Snekvik, S. E. Milan, S. Ohtani, B. J. Anderson, (2015), Birkeland current effects on high-latitude ground magnetic field perturbations, Geophysical Research Letters, 42, 18, 7248-7254

Defining and resolving current systems in geospace

Annales Geophysicae, 2015
N. Y. Ganushkina, M. W. Liemohn, S. Dubyagin, I. A. Daglis, I. Dandouras, D. L. De Zeeuw, Y. Ebihara, R. Ilie, R. Katus, M. Kubyshkina, S. E. Milan, S. Ohtani, N. Ostgaard, J. P. Reistad, P. Tenfjord, F. Toffoletto, S. Zaharia, O. Amariutei, (2015), Defining and resolving current systems in geospace, Annales Geophysicae, 33, 11, 1369-1402

High-resolution global magnetohydrodynamic simulation of bursty bulk flows

Journal of Geophysical Research-Space Physics, 2015
M. Wiltberger, V. Merkin, J. G. Lyon, S. Ohtani, (2015), High-resolution global magnetohydrodynamic simulation of bursty bulk flows, Journal of Geophysical Research-Space Physics, 120, 6, 4555-4566

On a possible connection between the longitudinally propagating near-Earth plasma sheet and auroral arc waves: A reexamination

Journal of Geophysical Research-Space Physics, 2015
T. Motoba, S. Ohtani, E. F. Donovan, V. Angelopoulos, (2015), On a possible connection between the longitudinally propagating near-Earth plasma sheet and auroral arc waves: A reexamination, Journal of Geophysical Research-Space Physics, 120, 1, 432-444

On the field-aligned electric field in the polar cap

Geophysical Research Letters, 2015
Simon Wing, Donald H. Fairfield, Jay R. Johnson, Shin-I. Ohtani, (2015), On the field-aligned electric field in the polar cap, Geophysical Research Letters, 42, 13, 5090-5099

On the formation and origin of substorm growth phase/onset auroral arcs inferred from conjugate space-ground observations

Journal of Geophysical Research-Space Physics, 2015
T. Motoba, S. Ohtani, B. J. Anderson, H. Korth, D. Mitchell, L. J. Lanzerotti, K. Shiokawa, M. Connors, C. A. Kletzing, G. D. Reeves, (2015), On the formation and origin of substorm growth phase/onset auroral arcs inferred from conjugate space-ground observations, Journal of Geophysical Research-Space Physics, 120, 10, 8707-8722

Pi2 pulsations observed around the dawn terminator

Journal of Geophysical Research-Space Physics, 2015
S. Imajo, A. Yoshikawa, T. Uozumi, S. Ohtani, A. Nakamizo, R. Marshall, B. M. Shevtsov, V. A. Akulichev, U. Sukhbaatar, A. Liedloff, K. Yumoto, (2015), Pi2 pulsations observed around the dawn terminator, Journal of Geophysical Research-Space Physics, 120, 3, 2088-2098

Responses of different ion species to fast plasma flows and local dipolarization in the plasma sheet

Journal of Geophysical Research-Space Physics, 2015
S. Ohtani, M. Nose, Y. Miyashita, A. T. Y. Lui, (2015), Responses of different ion species to fast plasma flows and local dipolarization in the plasma sheet, Journal of Geophysical Research-Space Physics, 120, 1, 187-200

Spatial structure and temporal evolution of energetic particle injections in the inner magnetosphere during the 14 July 2013 substorm event

Journal of Geophysical Research-Space Physics, 2015
Matina Gkioulidou, S. Ohtani, D. G. Mitchell, A. Y. Ukhorskiy, G. D. Reeves, D. L. Turner, J. W. Gjerloev, M. Nose, K. Koga, J. V. Rodriguez, L. J. Lanzerotti, (2015), Spatial structure and temporal evolution of energetic particle injections in the inner magnetosphere during the 14 July 2013 substorm event, Journal of Geophysical Research-Space Physics, 120, 3, 1924-1938

Field-aligned currents during the extreme solar minimum between the solar cycles 23 and 24

Journal of Geophysical Research-Space Physics, 2014
Simon Wing, Shinichi Ohtani, Jay Johnson, Gordon R. Wilson, Tomoyuki Higuchi, (2014), Field-aligned currents during the extreme solar minimum between the solar cycles 23 and 24, Journal of Geophysical Research-Space Physics, 119, 4, 2466-2475

Interrelationship between preonset auroral and magnetic signatures at a geomagnetically conjugate Iceland- Syowa pair

Journal of Geophysical Research-Space Physics, 2014
T. Motoba, S. Ohtani, A. Kadokura, J. Gjerloev, (2014), Interrelationship between preonset auroral and magnetic signatures at a geomagnetically conjugate Iceland- Syowa pair, Journal of Geophysical Research-Space Physics, 119, 2, 761-769

Magnetic reconnection, buoyancy, and flapping motions in magnetotail explosions

Journal of Geophysical Research-Space Physics, 2014
M. I. Sitnov, V. G. Merkin, M. Swisdak, T. Motoba, N. Buzulukova, T. E. Moore, B. H. Mauk, S. Ohtani, (2014), Magnetic reconnection, buoyancy, and flapping motions in magnetotail explosions, Journal of Geophysical Research-Space Physics, 119, 9

Nightside magnetospheric current circuit: Time constants of the solar wind-magnetosphere coupling

Journal of Geophysical Research-Space Physics, 2014
S. Ohtani, T. Uozumi, (2014), Nightside magnetospheric current circuit: Time constants of the solar wind-magnetosphere coupling, Journal of Geophysical Research-Space Physics, 119, 5, 3558-3572

Solar cycle dependence of nightside field-aligned currents: Effects of dayside ionospheric conductivity on the solar wind-magnetosphere-ionosphere coupling

Journal of Geophysical Research-Space Physics, 2014
S. Ohtani, S. Wing, V. G. Merkin, T. Higuchi, (2014), Solar cycle dependence of nightside field-aligned currents: Effects of dayside ionospheric conductivity on the solar wind-magnetosphere-ionosphere coupling, Journal of Geophysical Research-Space Physics, 119, 1, 322-334

Solar cycle variation of plasma mass density in the outer magnetosphere: Magnetoseismic analysis of toroidal standing Alfven waves detected by Geotail

Journal of Geophysical Research-Space Physics, 2014
Kazue Takahashi, Richard E. Denton, Masafumi Hirahara, Kyungguk Min, Shin-ichi Ohtani, Ennio Sanchez, (2014), Solar cycle variation of plasma mass density in the outer magnetosphere: Magnetoseismic analysis of toroidal standing Alfven waves detected by Geotail, Journal of Geophysical Research-Space Physics, 119, 10, 8338-8356

Storm time duskside equatorial current and its closure path

Journal of Geophysical Research-Space Physics, 2013
S. Dubyagin, N. Ganushkina, S. Apatenkov, M. Kubyshkina, S-I Ohtani, H. Singer, M. Liemohn, (2013), Storm time duskside equatorial current and its closure path, Journal of Geophysical Research-Space Physics, 118, 9, 5616-5625

Temporal and spatial dynamics of the regions 1 and 2 Birkeland currents during substorms

Journal of Geophysical Research-Space Physics, 2013
L. B. N. Clausen, J. B. H. Baker, J. M. Ruohoniemi, S. E. Milan, J. C. Coxon, S. Wing, S. Ohtani, B. J. Anderson, (2013), Temporal and spatial dynamics of the regions 1 and 2 Birkeland currents during substorms, Journal of Geophysical Research-Space Physics, 118, 6, 3007-3016

The response of the dayside equatorial electrojet to step-like changes of IMF B-Z

Journal of Geophysical Research-Space Physics, 2013
S. Ohtani, T. Uozumi, H. Kawano, A. Yoshikawa, H. Utada, T. Nagatsuma, K. Yumoto, (2013), The response of the dayside equatorial electrojet to step-like changes of IMF B-Z, Journal of Geophysical Research-Space Physics, 118, 6, 3637-3646

The role of compressional Pc5 pulsations in modulating precipitation of energetic electrons

Journal of Geophysical Research-Space Physics, 2013
T. Motoba, K. Takahashi, J. Gjerloev, S. Ohtani, D. K. Milling, (2013), The role of compressional Pc5 pulsations in modulating precipitation of energetic electrons, Journal of Geophysical Research-Space Physics, 118, 12, 7728-7739

Observational test of interchange instability associated with magnetic dipolarization in the near-Earth plasma sheet of r < 12 R-E

Journal of Geophysical Research-Space Physics, 2012
D. -Y. Lee, S. Ohtani, H. S. Kim, K. C. Kim, (2012), Observational test of interchange instability associated with magnetic dipolarization in the near-Earth plasma sheet of r < 12 R-E, Journal of Geophysical Research-Space Physics, 117

Statistical characteristics of plasma flows associated with magnetic dipolarizations in the near-tail region of r < 12 R-E

Journal of Geophysical Research-Space Physics, 2012
D. -Y. Lee, H. -S. Kim, S. Ohtani, M. Y. Park, (2012), Statistical characteristics of plasma flows associated with magnetic dipolarizations in the near-tail region of r < 12 R-E, Journal of Geophysical Research-Space Physics, 117

The double auroral oval in the dusk-midnight sector: Formation, mapping and dynamics

Journal of Geophysical Research-Space Physics, 2012
S. Ohtani, H. Korth, S. Wing, E. R. Talaat, H. U. Frey, J. W. Gjerloev, (2012), The double auroral oval in the dusk-midnight sector: Formation, mapping and dynamics, Journal of Geophysical Research-Space Physics, 117

AKR modulation and global Pi2 oscillation

Journal of Geophysical Research-Space Physics, 2011
Teiji Uozumi, K. Yumoto, T. Tokunaga, S. I. Solovyev, B. M. Shevtsov, R. Marshall, K. Liou, S. Ohtani, S. Abe, A. Ikeda, K. Kitamura, A. Yoshikawa, H. Kawano, M. Itonaga, (2011), AKR modulation and global Pi2 oscillation, Journal of Geophysical Research-Space Physics, 116

Characteristics of the terrestrial field-aligned current system

Annales Geophysicae, 2011
J. W. Gjerloev, S. Ohtani, T. Iijima, B. Anderson, J. Slavin, G. Le, (2011), Characteristics of the terrestrial field-aligned current system, Annales Geophysicae, 29, 10, 1713-1729

Displacement of conjugate points during a substorm in a global magnetohydrodynamic simulation

Journal of Geophysical Research-Space Physics, 2011
S. Saita, A. Kadokura, N. Sato, S. Fujita, T. Tanaka, Y. Ebihara, S. Ohtani, G. Ueno, K. Murata, D. Matsuoka, A. Kitamoto, T. Higuchi, (2011), Displacement of conjugate points during a substorm in a global magnetohydrodynamic simulation, Journal of Geophysical Research-Space Physics, 116

Energetic O+ and H+ ions in the plasma sheet: Implications for the transport of ionospheric ions

Journal of Geophysical Research-Space Physics, 2011
S. Ohtani, M. Nose, S. P. Christon, A. T. Y. Lui, (2011), Energetic O+ and H+ ions in the plasma sheet: Implications for the transport of ionospheric ions, Journal of Geophysical Research-Space Physics, 116

Magnetic field depression at the Earth's surface during energetic neutral atom emission fade-out in the inner magnetosphere

Journal of Geophysical Research-Space Physics, 2011
M. Nose, S. Ohtani, P. C. Son Brandt, T. Iyemori, K. Keika, D. -Y. Lee, (2011), Magnetic field depression at the Earth's surface during energetic neutral atom emission fade-out in the inner magnetosphere, Journal of Geophysical Research-Space Physics, 116

Pi 2 waves simultaneously observed by Cluster and CPMN ground-based magnetometers near the plasmapause

Annales Geophysicae, 2011
H. Kawano, S. Ohtani, T. Uozumi, T. Tokunaga, A. Yoshikawa, K. Yumoto, E. A. Lucek, M. Andre, CPMN Grp, (2011), Pi 2 waves simultaneously observed by Cluster and CPMN ground-based magnetometers near the plasmapause, Annales Geophysicae, 29, 9, 1663-1672

Self-consistent formulation for the evolution of ionospheric conductances at the ionospheric E region within the M-I coupling scheme

Journal of Geophysical Research-Space Physics, 2011
A. Yoshikawa, A. Nakamizo, O. Amm, H. Vanhamaki, R. Fujii, Y-M Tanaka, T. Uozumi, K. Yumoto, S. Ohtani, (2011), Self-consistent formulation for the evolution of ionospheric conductances at the ionospheric E region within the M-I coupling scheme, Journal of Geophysical Research-Space Physics, 116

Solar wind driving of dayside field-aligned currents

Journal of Geophysical Research-Space Physics, 2011
Simon Wing, Shin-ichi Ohtani, Jay R. Johnson, Marius Echim, Patrick T. Newell, Tomoyuki Higuchi, Genta Ueno, Gordon R. Wilson, (2011), Solar wind driving of dayside field-aligned currents, Journal of Geophysical Research-Space Physics, 116

Can intense substorms occur under northward IMF conditions?

Journal of Geophysical Research-Space Physics, 2010
D. -Y. Lee, K. -C. Choi, S. Ohtani, J. H. Lee, K. C. Kim, K. S. Park, K. -H. Kim, (2010), Can intense substorms occur under northward IMF conditions?, Journal of Geophysical Research-Space Physics, 115

Dayside field-aligned current source regions

Journal of Geophysical Research-Space Physics, 2010
Simon Wing, Shin-ichi Ohtani, Patrick T. Newell, Tomoyuki Higuchi, Genta Ueno, James M. Weygand, (2010), Dayside field-aligned current source regions, Journal of Geophysical Research-Space Physics, 115

Inductive electric fields in the inner magnetosphere during geomagnetically active periods

Journal of Geophysical Research-Space Physics, 2010
S. Ohtani, H. Korth, K. Keika, Y. Zheng, P. C. Brandt, S. B. Mende, (2010), Inductive electric fields in the inner magnetosphere during geomagnetically active periods, Journal of Geophysical Research-Space Physics, 115

Locations of night-side precipitation boundaries relative to R2 and R1 currents

Journal of Geophysical Research-Space Physics, 2010
S. Ohtani, S. Wing, P. T. Newell, T. Higuchi, (2010), Locations of night-side precipitation boundaries relative to R2 and R1 currents, Journal of Geophysical Research-Space Physics, 115

Mass-dependent evolution of energetic neutral atoms energy spectra during storm time substorms: Implication for O+ nonadiabatic acceleration

Journal of Geophysical Research-Space Physics, 2010
K. Keika, P. C. Brandt, S. Ohtani, D. G. Mitchell, K. Min, M. Nose, T. Obara, H. Koshiishi, H. Matsumoto, (2010), Mass-dependent evolution of energetic neutral atoms energy spectra during storm time substorms: Implication for O+ nonadiabatic acceleration, Journal of Geophysical Research-Space Physics, 115

Multisatellite low-altitude observations of a magnetopause merging burst

Journal of Geophysical Research-Space Physics, 2010
Patrick T. Newell, Anna R. Lee, Kan Liou, Shin Ohtani, Simon Wing, Marc Hairston, (2010), Multisatellite low-altitude observations of a magnetopause merging burst, Journal of Geophysical Research-Space Physics, 115

On the poleward boundary of the nightside auroral oval under northward interplanetary magnetic field conditions

Journal of Geophysical Research-Space Physics, 2010
D. -Y. Lee, S. Ohtani, J. H. Lee, (2010), On the poleward boundary of the nightside auroral oval under northward interplanetary magnetic field conditions, Journal of Geophysical Research-Space Physics, 115

Response of the auroral electrojet indices to abrupt southward IMF turnings

Annales Geophysicae, 2010
J. W. Gjerloev, R. A. Hoffman, S. Ohtani, J. Weygand, R. Barnes, (2010), Response of the auroral electrojet indices to abrupt southward IMF turnings, Annales Geophysicae, 28, 5, 1167-1182

Some statistical properties of flow bursts in the magnetotail

Journal of Geophysical Research-Space Physics, 2010
Hyun-Sook Kim, Dae-Young Lee, Shin-Ichi Ohtani, En-Sang Lee, Byung-Ho Ahn, (2010), Some statistical properties of flow bursts in the magnetotail, Journal of Geophysical Research-Space Physics, 115

Statistical characteristics and significance of low-frequency instability associated with magnetic dipolarizations in the near-Earth plasma sheet

Journal of Geophysical Research-Space Physics, 2010
M. Y. Park, D. -Y. Lee, S. Ohtani, K. C. Kim, (2010), Statistical characteristics and significance of low-frequency instability associated with magnetic dipolarizations in the near-Earth plasma sheet, Journal of Geophysical Research-Space Physics, 115

Substorm and pseudo-substorm Pi2 pulsations observed during the interval of quasi-periodic magnetotail flow bursts: A case study

Earth Planets and Space, 2010
K-H. Kim, K. Takahashi, S. Ohtani, K. Yumoto, D-H. Lee, H. Jin, J. Seon, S-K. Sung, (2010), Substorm and pseudo-substorm Pi2 pulsations observed during the interval of quasi-periodic magnetotail flow bursts: A case study, Earth Planets and Space, 62, 4, 413-425

Substorm cycle dependence of various types of aurora

Journal of Geophysical Research-Space Physics, 2010
Patrick T. Newell, Anna R. Lee, Kan Liou, Shin-I. Ohtani, Thomas Sotirelis, Simon Wing, (2010), Substorm cycle dependence of various types of aurora, Journal of Geophysical Research-Space Physics, 115

Dependence of premidnight field-aligned currents and particle precipitation on solar illumination

Journal of Geophysical Research-Space Physics, 2009
S. Ohtani, S. Wing, G. Ueno, T. Higuchi, (2009), Dependence of premidnight field-aligned currents and particle precipitation on solar illumination, Journal of Geophysical Research-Space Physics, 114

Geomagnetic signatures of auroral substorms preceded by pseudobreakups

Journal of Geophysical Research-Space Physics, 2009
A. Kullen, S. Ohtani, T. Karlsson, (2009), Geomagnetic signatures of auroral substorms preceded by pseudobreakups, Journal of Geophysical Research-Space Physics, 114

Impact of the solar wind dynamic pressure on the Region 2 field-aligned currents

Journal of Geophysical Research-Space Physics, 2009
S. Nakano, G. Ueno, S. Ohtani, T. Higuchi, (2009), Impact of the solar wind dynamic pressure on the Region 2 field-aligned currents, Journal of Geophysical Research-Space Physics, 114

On the loss of relativistic electrons at geosynchronous altitude: Its dependence on magnetic configurations and external conditions

Journal of Geophysical Research-Space Physics, 2009
S. Ohtani, Y. Miyoshi, H. J. Singer, J. M. Weygand, (2009), On the loss of relativistic electrons at geosynchronous altitude: Its dependence on magnetic configurations and external conditions, Journal of Geophysical Research-Space Physics, 114

Propagation characteristics of Pi 2 pulsations observed at high- and low-latitude MAGDAS/CPMN stations: A statistical study

Journal of Geophysical Research-Space Physics, 2009
Teiji Uozumi, S. Abe, K. Kitamura, T. Tokunaga, A. Yoshikawa, H. Kawano, R. Marshall, R. J. Morris, B. M. Shevtsov, S. I. Solovyev, D. J. McNamara, K. Liou, S. Ohtani, M. Itonaga, K. Yumoto, (2009), Propagation characteristics of Pi 2 pulsations observed at high- and low-latitude MAGDAS/CPMN stations: A statistical study, Journal of Geophysical Research-Space Physics, 114

Simultaneous observations of the plasma density on the same field line by the CPMN ground magnetometers and the Cluster satellites

Advances in Space Research, 2009
Naoya Maeda, Satoko Takasaki, Hideaki Kawano, Shinichi Ohtani, P. M. E. Decreau, J. G. Trotignon, S. I. Solovyev, D. G. Baishev, Kiyohumi Yumoto, (2009), Simultaneous observations of the plasma density on the same field line by the CPMN ground magnetometers and the Cluster satellites, Advances in Space Research, 43, 2, 265-272

Substorm onset timing via traveltime magnetoseismology

Geophysical Research Letters, 2009
P. J. Chi, C. T. Russell, S. Ohtani, (2009), Substorm onset timing via traveltime magnetoseismology, Geophysical Research Letters, 36

Tailward flows with positive B-Z in the near-Earth plasma sheet

Journal of Geophysical Research-Space Physics, 2009
S. Ohtani, Y. Miyashita, H. Singer, T. Mukai, (2009), Tailward flows with positive B-Z in the near-Earth plasma sheet, Journal of Geophysical Research-Space Physics, 114

A method for estimating the ring current structure and the electric potential distribution using energetic neutral atom data assimilation

Journal of Geophysical Research-Space Physics, 2008
S. Nakano, G. Ueno, Y. Ebihara, M. -C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, T. Higuchi, (2008), A method for estimating the ring current structure and the electric potential distribution using energetic neutral atom data assimilation, Journal of Geophysical Research-Space Physics, 113, A5

Ion composition in the plasma trough and plasma plume derived from a Combined Release and Radiation Effects Satellite magnetoseismic study

Journal of Geophysical Research-Space Physics, 2008
Kazue Takahashi, Shin-ichi Ohtani, Richard E. Denton, W. Jeffrey Hughes, Roger R. Anderson, (2008), Ion composition in the plasma trough and plasma plume derived from a Combined Release and Radiation Effects Satellite magnetoseismic study, Journal of Geophysical Research-Space Physics, 113, A12

Solar wind control of plasma number density in the near-Earth plasma sheet: three-dimensional structure

Annales Geophysicae, 2008
D. Nagata, S. Machida, S. Ohtani, Y. Saito, T. Mukai, (2008), Solar wind control of plasma number density in the near-Earth plasma sheet: three-dimensional structure, Annales Geophysicae, 26, 12, 4031-4049

Statistical characteristics of the storm time plasma sheet

Journal of Geophysical Research-Space Physics, 2008
S. Ohtani, T. Mukai, (2008), Statistical characteristics of the storm time plasma sheet, Journal of Geophysical Research-Space Physics, 113, A1

Two classes of earthward fast flows in the plasma sheet

Journal of Geophysical Research-Space Physics, 2008
J. -H. Shue, A. Ieda, A. T. Y. Lui, G. K. Parks, T. Mukai, S. Ohtani, (2008), Two classes of earthward fast flows in the plasma sheet, Journal of Geophysical Research-Space Physics, 113, A2

Cluster observations in the inner magnetosphere during the 18 April 2002 sawtooth event: Dipolarization and injection at r=4.6 R-E

Journal of Geophysical Research-Space Physics, 2007
S. Ohtani, H. Korth, P. C. Brandt, L. G. Blomberg, H. J. Singer, M. G. Henderson, E. A. Lucek, H. U. Frey, Q. Zong, J. M. Weygand, Y. Zheng, A. T. Y. Lui, (2007), Journal of Geophysical Research-Space Physics, 112, A8

Energetic neutral atom response to solar wind dynamic pressure enhancements

Journal of Geophysical Research-Space Physics, 2007
D.-Y. Lee, S. Ohtani, P. C. Brandt, L. R. Lyons, (2007), Energetic neutral atom response to solar wind dynamic pressure enhancements, Journal of Geophysical Research-Space Physics, 112, A9

Particle precipitation characteristics in the dayside four-sheet field-aligned current structure

Journal of Geophysical Research-Space Physics, 2007
Genta Ueno, Tomoyuki Higuchi, Shin-ichi Ohtani, Patrick T. Newell, (2007), Particle precipitation characteristics in the dayside four-sheet field-aligned current structure, Journal of Geophysical Research-Space Physics, 112, A6

Solar wind control of plasma number density in the near-Earth plasma sheet

Journal of Geophysical Research-Space Physics, 2007
D. Nagata, S. Machida, S. Ohtani, Y. Saito, T. Mukai, (2007), Solar wind control of plasma number density in the near-Earth plasma sheet, Journal of Geophysical Research-Space Physics, 112, A9

Statistical analysis of the relationship between earthward flow bursts in the magnetotail and low-latitude Pi2 pulsations

Journal of Geophysical Research-Space Physics, 2007
K.-H. Kim, K. Takahashi, S. Ohtani, S.-K. Sung, (2007), Statistical analysis of the relationship between earthward flow bursts in the magnetotail and low-latitude Pi2 pulsations, Journal of Geophysical Research-Space Physics, 112, A10

Storm-time magnetic configurations at geosynchronous orbit: Comparison between the main and recovery phases

Journal of Geophysical Research-Space Physics, 2007
S. Ohtani, Y. Ebihara, H. J. Singer, (2007), Storm-time magnetic configurations at geosynchronous orbit: Comparison between the main and recovery phases, Journal of Geophysical Research-Space Physics, 112, A5

Contribution of charge exchange loss to the storm time ring current decay: IMAGE/HENA observations

Journal of Geophysical Research-Space Physics, 2006
K. Keika, M. Nose, P. C. Brandt, S. Ohtani, D. G. Mitchell, E. C. Roelof, (2006), Contribution of charge exchange loss to the storm time ring current decay: IMAGE/HENA observations, Journal of Geophysical Research-Space Physics, 111, A11

Convection electric field in the near-Earth tail during the super magnetic storm of November 20-21, 2003

Geophysical Research Letters, 2006
Tomoaki Hori, A. T. Y. Lui, S. Ohtani, P. C. Brandt, B. H. Mauk, R. W. McEntire, K. Maezawa, T. Mukai, Y. Kasaba, H. Hayakawa, (2006), Convection electric field in the near-Earth tail during the super magnetic storm of November 20-21, 2003, Geophysical Research Letters, 33, 21

Effects of the fast plasma sheet flow on the geosynchronous magnetic configuration: Geotail and GOES coordinated study

Journal of Geophysical Research-Space Physics, 2006
S Ohtani, HJ Singer, T Mukai, (2006), Effects of the fast plasma sheet flow on the geosynchronous magnetic configuration: Geotail and GOES coordinated study, Journal of Geophysical Research-Space Physics, 111, A1

Plasma sheet expansion: Statistical characteristics

Journal of Geophysical Research-Space Physics, 2006
S. Ohtani, T. Mukai, (2006), Plasma sheet expansion: Statistical characteristics, Journal of Geophysical Research-Space Physics, 111, A5

Remote sensing of a near-Earth neutral line during the 5 October 2000 substorm

Annales Geophysicae, 2006
D. Nagata, S. Machida, S. Ohtani, S. B. Mende, Y. Saito, T. Mukai, (2006), Remote sensing of a near-Earth neutral line during the 5 October 2000 substorm, Annales Geophysicae, 24, 12, 3497-3505

Simultaneous identification of a plasmaspheric plume by a ground magnetometer pair and IMAGE Extreme Ultraviolet Imager

Journal of Geophysical Research-Space Physics, 2006
S. Abe, H. Kawano, J. Goldstein, S. Ohtani, S. I. Solovyev, D. G. Baishev, K. Yumoto, (2006), Simultaneous identification of a plasmaspheric plume by a ground magnetometer pair and IMAGE Extreme Ultraviolet Imager, Journal of Geophysical Research-Space Physics, 111, A11

Statistical characteristics of hydrogen and oxygen ENA emission from the storm-time ring current

Journal of Geophysical Research-Space Physics, 2006
S Ohtani, PC Brandt, HJ Singer, DG Mitchell, EC Roelof, (2006), Statistical characteristics of hydrogen and oxygen ENA emission from the storm-time ring current, Journal of Geophysical Research-Space Physics, 111, A6

Annual and semiannual variations of the location and intensity of large-scale field-aligned currents

Journal of Geophysical Research-Space Physics, 2005
S Ohtani, G Ueno, T Higuchi, H Kawano, (2005), Annual and semiannual variations of the location and intensity of large-scale field-aligned currents, Journal of Geophysical Research-Space Physics, 110, A1

Local time distribution of low and middle latitude ground magnetic disturbances at sawtooth injections of 18-19 April 2002

Journal of Geophysical Research-Space Physics, 2005
K Kitamura, H Kawano, S Ohtani, A Yoshikawa, K Yumoto, (2005), Local time distribution of low and middle latitude ground magnetic disturbances at sawtooth injections of 18-19 April 2002, Journal of Geophysical Research-Space Physics, 110, A7

Outflow of energetic ions from the magnetosphere and its contribution to the decay of the storm time ring current

Journal of Geophysical Research-Space Physics, 2005
K Keika, M Nose, S Ohtani, K Takahashi, SP Christon, RW McEntire, (2005), Outflow of energetic ions from the magnetosphere and its contribution to the decay of the storm time ring current, Journal of Geophysical Research-Space Physics, 110, A9

Storm time dawn-dusk asymmetry of the large-scale Birkeland currents

Journal of Geophysical Research-Space Physics, 2005
BJ Anderson, SI Ohtani, H Korth, A Ukhorskiy, (2005), Storm time dawn-dusk asymmetry of the large-scale Birkeland currents, Journal of Geophysical Research-Space Physics, 110, A12

Storm-substorm relationship: Variations of the hydrogen and oxygen energetic neutral atom intensities during storm-time substorms

Journal of Geophysical Research-Space Physics, 2005
S Ohtani, PC Brandt, DG Mitchell, H Singer, M Nose, GD Reeves, SB Mende, (2005), Storm-substorm relationship: Variations of the hydrogen and oxygen energetic neutral atom intensities during storm-time substorms, Journal of Geophysical Research-Space Physics, 110, A7

Storm-time convection electric field in the near-Earth plasma sheet

Journal of Geophysical Research-Space Physics, 2005
T Hori, ATY Lui, S Ohtani, PC Brandt, BH Mauk, RW McEntire, K Maezawa, T Mukai, Y Kasaba, H Hayakawa, (2005), Storm-time convection electric field in the near-Earth plasma sheet, Journal of Geophysical Research-Space Physics, 110, A4

Comparison of large-scale field-aligned currents under sunlit and dark ionospheric conditions

Journal of Geophysical Research-Space Physics, 2005
S Ohtani, G Ueno, T Higuchi, (2005), Comparison of large-scale field-aligned currents under sunlit and dark ionospheric conditions, Journal of Geophysical Research-Space Physics, 110, A9

Auroral streamers: characteristics of associated precipitation, convection and field-aligned currents

Annales Geophysicae, 2004
VA Sergeev, K Liou, PT Newell, SI Ohtani, MR Hairston, F Rich, (2004), Auroral streamers: characteristics of associated precipitation, convection and field-aligned currents, Annales Geophysicae, 22, 2, 537-548

Data-derived forecasting model for relativistic electron intensity at geosynchronous orbit

Geophysical Research Letters, 2004
AY Ukhorskiy, MI Sitnov, AS Sharma, BJ Anderson, S Ohtani, ATY Lui, (2004), Data-derived forecasting model for relativistic electron intensity at geosynchronous orbit, Geophysical Research Letters, 31, 9

Flow bursts in the plasma sheet and auroral substorm onset: Observational constraints on connection between midtail and near-Earth substorm processes

Space Science Reviews, 2004
SI Ohtani, (2004), Flow bursts in the plasma sheet and auroral substorm onset: Observational constraints on connection between midtail and near-Earth substorm processes, Space Science Reviews, 113, 1-2, 77-96

IMAGEMENA: pressure and current distributions during the 1 October 2002 storm

Streamers, Slow Solar Wind, and the Dynamics of the Magnetosphere, 2004
PC Brandt, EC Roelof, S Ohtani, DG Mitchell, B Anderson, R VonSteiger, ATY Lui, PT Newell, OA Troshhichev, (2004), IMAGEMENA: pressure and current distributions during the 1 October 2002 storm, Streamers, Slow Solar Wind, and the Dynamics of the Magnetosphere, 33 , 719-722

Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7

Annales Geophysicae, 2004
K Haraguchi, H Kawano, K Yumoto, S Ohtani, T Higuchi, G Ueno, (2004), Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7, Annales Geophysicae, 22, 8, 2775-2783

Magnetotail behavior during storm time "sawtooth injections"

Journal of Geophysical Research-Space Physics, 2004
ATY Lui, T Hori, S Ohtani, Y Zhang, XY Zhou, MG Henderson, T Mukai, H Hayakawa, SB Mende, (2004), Magnetotail behavior during storm time "sawtooth injections", Journal of Geophysical Research-Space Physics, 109, A10

Propagation characteristics of Pi 2 magnetic pulsations observed at ground high latitudes

Journal of Geophysical Research-Space Physics, 2004
T Uozumi, K Yumoto, H Kawano, A Yoshikawa, S Ohtani, JV Olson, SI Akasofu, SI Solovyev, EF Vershinin, K Liou, CI Meng, (2004), Propagation characteristics of Pi 2 magnetic pulsations observed at ground high latitudes, Journal of Geophysical Research-Space Physics, 109, A8

Tail current surge: New insights from a global MHD simulation and comparison with satellite observations

Journal of Geophysical Research-Space Physics, 2004
S Ohtani, J Raeder, (2004), Tail current surge: New insights from a global MHD simulation and comparison with satellite observations, Journal of Geophysical Research-Space Physics, 109, A1

Tail dynamics during the growth phase of the 24 November 1996, substorm event: Near-Earth reconnection confined in the plasma sheet

Journal of Geophysical Research-Space Physics, 2004
S Ohtani, G Ueno, R Yamaguchi, H Singer, F Creutzberg, K Yumoto, K Kitamura, T Mukai, (2004), Tail dynamics during the growth phase of the 24 November 1996, substorm event: Near-Earth reconnection confined in the plasma sheet, Journal of Geophysical Research-Space Physics, 109, A5

Temporal structure of the fast convective flow in the plasma sheet: Comparison between observations and two-fluid simulations

Journal of Geophysical Research-Space Physics, 2004
S Ohtani, MA Shay, T Mukai, (2004), Temporal structure of the fast convective flow in the plasma sheet: Comparison between observations and two-fluid simulations, Journal of Geophysical Research-Space Physics, 109, A3

Total pressure variations in the magnetotail as a function of the position and the substorm magnitude

Journal of Geophysical Research-Space Physics, 2004
R Yamaguchi, H Kawano, S Ohtani, S Kokubun, K Yumoto, (2004), Total pressure variations in the magnetotail as a function of the position and the substorm magnitude, Journal of Geophysical Research-Space Physics, 109, A3

A substorm-associated drift echo of energetic protons observed by Geotail: Radial density gradient structure

Geophysical Research Letters, 2003
T Hori, S Ohtani, ATY Lui, RW McEntire, K Maezawa, Y Saito, T Mukai, (2003), A substorm-associated drift echo of energetic protons observed by Geotail: Radial density gradient structure, Geophysical Research Letters, 30, 6

Hall current system around the magnetic neutral line in the magnetotail: Statistical study

Journal of Geophysical Research-Space Physics, 2003
G Ueno, S Ohtani, T Mukai, Y Saito, H Hayakawa, (2003), Hall current system around the magnetic neutral line in the magnetotail: Statistical study, Journal of Geophysical Research-Space Physics, 108, A9

Quantitative relationships between plasma sheet fast flows and nightside auroral power

Journal of Geophysical Research-Space Physics, 2003
JH Shue, S Ohtani, PT Newell, K Liou, CI Meng, A Ieda, T Mukai, (2003), Quantitative relationships between plasma sheet fast flows and nightside auroral power, Journal of Geophysical Research-Space Physics, 108, A6

Quiet time magnetotail plasma flow: Coordinated Polar ultraviolet images and Geotail observations

Journal of Geophysical Research-Space Physics, 2003
A Ieda, JH Shue, K Liou, SI Ohtani, CI Meng, DH Fairfield, T Mukai, Y Saito, S Machida, T Nagai, GK Parks, (2003), Quiet time magnetotail plasma flow: Coordinated Polar ultraviolet images and Geotail observations, Journal of Geophysical Research-Space Physics, 108, A9

Simultaneous EISCAT Svalbard radar and DMSP observations of ion upflow in the dayside polar ionosphere

Journal of Geophysical Research-Space Physics, 2003
Y Ogawa, R Fujii, SC Buchert, S Nozawa, S Ohtani, (2003), Simultaneous EISCAT Svalbard radar and DMSP observations of ion upflow in the dayside polar ionosphere, Journal of Geophysical Research-Space Physics, 108, A3

Does the braking of the fast plasma flow trigger a substorm?: A study of the August 14, 1996, event

Geophysical Research Letters, 2002
S Ohtani, R Yamaguchi, H Kawano, F Creutzberg, JB Sigwarth, LA Frank, T Mukai, (2002), Does the braking of the fast plasma flow trigger a substorm?: A study of the August 14, 1996, event, Geophysical Research Letters, 29, 15

Electron dynamics in the current disruption region

Journal of Geophysical Research-Space Physics, 2002
S Ohtani, K Takahashi, ATY Lui, (2002), Electron dynamics in the current disruption region, Journal of Geophysical Research-Space Physics, 107, A10

ENA observations of a global substorm growthphase dropout in the nightside magnetosphere

Geophysical Research Letters, 2002
PC Brandt, S Ohtani, DG Mitchell, R Demajistre, EC Roelof, (2002), ENA observations of a global substorm growthphase dropout in the nightside magnetosphere, Geophysical Research Letters, 29, 20

Field-aligned currents in the outermost plasma sheet boundary layer with Geotail observation

Journal of Geophysical Research-Space Physics, 2002
G Ueno, S Ohtani, Y Saito, T Mukai, (2002), Field-aligned currents in the outermost plasma sheet boundary layer with Geotail observation, Journal of Geophysical Research-Space Physics, 107, A11

Global ENA observations of the storm mainphase ring current: Implications for skewed electric fields in the inner magnetosphere

Geophysical Research Letters, 2002
PC Brandt, S Ohtani, DG Mitchell, MC Fok, EC Roelof, R Demajistre, (2002), Global ENA observations of the storm mainphase ring current: Implications for skewed electric fields in the inner magnetosphere, Geophysical Research Letters, 29, 20

IMAGE/high-energy energetic neutral atom: Global energetic neutral atom imaging of the plasma sheet and ring current during substorms

Journal of Geophysical Research-Space Physics, 2002
PC Brandt, R Demajistre, EC Roelof, S Ohtani, DG Mitchell, S Mende, (2002), IMAGE/high-energy energetic neutral atom: Global energetic neutral atom imaging of the plasma sheet and ring current during substorms, Journal of Geophysical Research-Space Physics, 107, A12

Particle simulation study of substorm triggering with a southward IMF

Dynamic Processes in the Critical Magnetospheric Regions and Radiation Belt Models, Proceedings, 2002
KI Nishikawa, S Ohtani, CT Russell, S Savin, M Kruglanski, (2002), Particle simulation study of substorm triggering with a southward IMF, Dynamic Processes in the Critical Magnetospheric Regions and Radiation Belt Models, Proceedings, 30 , 2675-2681

Pi2 onset time determination with information criterion

Journal of Geophysical Research-Space Physics, 2002
T Higuchi, SI Ohtani, T Uozumi, K Yumoto, (2002), Pi2 onset time determination with information criterion, Journal of Geophysical Research-Space Physics, 107, A7

Quiet time magnetotail dynamics and their implications for the substorm trigger

Journal of Geophysical Research-Space Physics, 2002
S Ohtani, R Yamaguchi, M Nose, H Kawano, M Engebretson, K Yumoto, (2002), Quiet time magnetotail dynamics and their implications for the substorm trigger, Journal of Geophysical Research-Space Physics, 107, A2

The timing relationship between bursty bulk flows and Pi2s at the geosynchronous orbit

Geophysical Research Letters, 2002
R Yamaguchi, H Kawano, S Ohtani, K Yumoto, T Mukai, Y Saito, H Hayakawa, Circum-pan Pacif Magnetometer Network, (2002), The timing relationship between bursty bulk flows and Pi2s at the geosynchronous orbit, Geophysical Research Letters, 29, 6

Acceleration signatures in the dayside boundary layer and the cusp

Physics and Chemistry of the Earth Part C-Solar-Terrestial and Planetary Science, 2001
M Yamauchi, L Andersson, PA Lindqvist, S Ohtani, J Clemmons, JE Wahlund, L Eliasson, R Lundin, (2001), Acceleration signatures in the dayside boundary layer and the cusp, Physics and Chemistry of the Earth Part C-Solar-Terrestial and Planetary Science, 26, 1-3, 195-200

Broadband transverse waves below 1 Hz in the afternoon sector of the magnetosphere

Journal of Geophysical Research-Space Physics, 2001
H Matsui, K Hayashi, T Mukai, S Ohtani, S Kokubun, T Yamamoto, H Matsumoto, K Tsuruda, (2001), Broadband transverse waves below 1 Hz in the afternoon sector of the magnetosphere, Journal of Geophysical Research-Space Physics, 106, A9, 18873-18882

Comment on "Evaluation of low-latitude Pi2 pulsations as indicators of substorm onset using Polar ultraviolet imagery" by K. Liou, et al. - Reply

Journal of Geophysical Research-Space Physics, 2001
K Liou, PT Newell, CI Meng, K Takahashi, SI Ohtani, ATY Lui, M Brittnacher, G Parks, (2001), Comment on "Evaluation of low-latitude Pi2 pulsations as indicators of substorm onset using Polar ultraviolet imagery" by K. Liou, et al. - Reply, Journal of Geophysical Research-Space Physics, 106, A9, 18923-18926

CRRES observation of Pi2 pulsations: Wave mode inside and outside the plasmasphere

Journal of Geophysical Research-Space Physics, 2001
K Takahashi, S Ohtani, WJ Hughes, RR Anderson, (2001), CRRES observation of Pi2 pulsations: Wave mode inside and outside the plasmasphere, Journal of Geophysical Research-Space Physics, 106, A8, 15567-15581

Ion composition of the near-Earth plasma sheet in storm and quiet intervals: Geotail/EPIC measurements

Journal of Geophysical Research-Space Physics, 2001
M Nose, S Ohtani, K Takahashi, ATY Lui, RW McEntire, DJ Williams, SP Christon, K Yumoto, (2001), Ion composition of the near-Earth plasma sheet in storm and quiet intervals: Geotail/EPIC measurements, Journal of Geophysical Research-Space Physics, 106, A5, 8391-8403

CRRES observation of Pi2 pulsations: Wave mode inside and outside the plasmasphere (vol 106, pg 15,567, 2001)

Journal of Geophysical Research: Atmospheres, 2001
K Takahashi, S Ohtani, WJ Hughes, RR Anderson, (2001), CRRES observation of Pi2 pulsations: Wave mode inside and outside the plasmasphere (vol 106, pg 15,567, 2001), Journal of Geophysical Research: Atmospheres

Four-sheet structures of dayside field-aligned currents: Statistical study (vol 105, pg 25, 2000)

Journal of Geophysical Research: Atmospheres, 2001
S Ohtani, T Higuchi, (2001), Four-sheet structures of dayside field-aligned currents: Statistical study (vol 105, pg 25, 2000), Journal of Geophysical Research: Atmospheres

Storm-substorm relationship: Contribution of the tail current to Dst

Journal of Geophysical Research-Space Physics, 2001
S Ohtani, M Nose, G Rostoker, H Singer, ATY Lui, M Nakamura, (2001), Storm-substorm relationship: Contribution of the tail current to Dst, Journal of Geophysical Research-Space Physics, 106, A10, 21199-21209

Substorm trigger processes in the magnetotail: Recent observations and outstanding issues

Space Science Reviews, 2001
S Ohtani, (2001), Substorm trigger processes in the magnetotail: Recent observations and outstanding issues, Space Science Reviews, 95, 1-2, 347-359

Acceleration of oxygen ions of ionospheric origin in the near-Earth magnetotail during substorms

Journal of Geophysical Research-Space Physics, 2000
M Nose, ATY Lui, S Ohtani, BH Mauk, RW McEntire, DJ Williams, T Mukai, K Yumoto, (2000), Acceleration of oxygen ions of ionospheric origin in the near-Earth magnetotail during substorms, Journal of Geophysical Research-Space Physics, 105, A4, 7669-7677

Automatic identification of large-scale field-aligned current structures

Journal of Geophysical Research-Space Physics, 2000
T Higuchi, S Ohtani, (2000), Automatic identification of large-scale field-aligned current structures, Journal of Geophysical Research-Space Physics, 105, A11, 25305-25315

Change of energetic ion composition in the plasma sheet during substorms

Journal of Geophysical Research-Space Physics, 2000
M Nose, S Ohtani, ATY Lui, SP Christon, RW McEntire, DJ Williams, T Mukai, Y Saito, K Yumoto, (2000), Change of energetic ion composition in the plasma sheet during substorms, Journal of Geophysical Research-Space Physics, 105, A10, 23277-23286

Conjunction of tail satellites for substorm study: ISTP event of 1997 January 2

Geophysical Research Letters, 2000
ATY Lui, K Liou, PT Newell, CI Meng, S Ohtani, RW McEntire, NJ Fox, RP Lepping, WR Paterson, JB Sigwarth, LA Frank, S Kokubun, GK Parks, T Moretto, K Yumoto, (2000), Conjunction of tail satellites for substorm study: ISTP event of 1997 January 2, Geophysical Research Letters, 27, 13, 1831-1834

Dawn-dusk profile of field-aligned currents on May 11, 1999: A familiar pattern driven by an unusual cause

Geophysical Research Letters, 2000
S Ohtani, PT Newell, K Takahashi, (2000), Dawn-dusk profile of field-aligned currents on May 11, 1999: A familiar pattern driven by an unusual cause, Geophysical Research Letters, 27, 23, 3777-3780

Electric current approach to magnetospheric physics and the distinction between current disruption and magnetic reconnection

Magnetospheric Current Systems, 2000
ATY Lui, S Ohtani, R Fujii, M Hesse, RL Lysak, (2000), Electric current approach to magnetospheric physics and the distinction between current disruption and magnetic reconnection, Magnetospheric Current Systems, 118 , 31-40

Evaluation of low-latitude Pi2 pulsations as indicators of substorm onset using Polar ultraviolet imagery

Journal of Geophysical Research-Space Physics, 2000
K Liou, CI Meng, PT Newell, K Takahashi, SI Ohtani, ATY Lui, M Brittnacher, G Parks, (2000), Evaluation of low-latitude Pi2 pulsations as indicators of substorm onset using Polar ultraviolet imagery, Journal of Geophysical Research-Space Physics, 105, A2, 2495-2505

Evolution of thin current sheet with a southward interplanetary magnetic field studied by a three-dimensional electromagnetic particle code

Journal of Geophysical Research-Space Physics, 2000
KI Nishikawa, S Ohtani, (2000), Evolution of thin current sheet with a southward interplanetary magnetic field studied by a three-dimensional electromagnetic particle code, Journal of Geophysical Research-Space Physics, 105, A6, 13017-13028

Four-sheet structures of dayside field-aligned currents: Statistical study

Journal of Geophysical Research-Space Physics, 2000
S Ohtani, T Higuchi, (2000), Four-sheet structures of dayside field-aligned currents: Statistical study, Journal of Geophysical Research-Space Physics, 105, A11, 25317-25324

Global particle simulation for a space weather model: Present and future

Ieee Transactions on Plasma Science, 2000
KI Nishikawa, S Ohtani, (2000), Global particle simulation for a space weather model: Present and future, Ieee Transactions on Plasma Science, 28, 6, 1991-2006

Ion dynamics and tail current intensification prior to dipolarization: The June 1, 1985, event

Journal of Geophysical Research-Space Physics, 2000
S Ohtani, ATY Lui, K Takahashi, DG Mitchell, T Sarris, (2000), Ion dynamics and tail current intensification prior to dipolarization: The June 1, 1985, event, Journal of Geophysical Research-Space Physics, 105, A11, 25233-25246

Cold dense plasma in the outer magnetosphere

Journal of Geophysical Research-Space Physics, 1999
H Matsui, T Mukai, S Ohtani, K Hayashi, RC Elphic, MF Thomsen, H Matsumoto, (1999), Cold dense plasma in the outer magnetosphere, Journal of Geophysical Research-Space Physics, 104, A11, 25077-25095

Coordinated ISTP satellite and ground observations of morningside Pc5 waves

Journal of Geophysical Research-Space Physics, 1999
S Ohtani, G Rostoker, K Takahashi, V Angelopoulos, M Nakamura, C Waters, H Singer, S Kokubun, K Tsuruda, WJ Hughes, TA Potemra, LJ Zanetti, JB Gary, ATY Lui, DJ Williams, (1999), Coordinated ISTP satellite and ground observations of morningside Pc5 waves, Journal of Geophysical Research-Space Physics, 104, A2, 2381-2397

Near-Earth dipolarization: Evidence for a non-MHD process

Geophysical Research Letters, 1999
ATY Lui, K Liou, M Nose, S Ohtani, DJ Williams, T Mukai, K Tsuruda, S Kokubun, (1999), Near-Earth dipolarization: Evidence for a non-MHD process, Geophysical Research Letters, 26, 19, 2905-2908

Substorm onset timing: The December 31, 1995, event

Journal of Geophysical Research-Space Physics, 1999
S Ohtani, F Creutzberg, T Mukai, H Singer, ATY Lui, M Nakamura, P Prikryl, K Yumoto, G Rostoker, (1999), Substorm onset timing: The December 31, 1995, event, Journal of Geophysical Research-Space Physics, 104, A10, 22713-22727

AMPTE/CCE-SCATHA simultaneous observations of substorm-associated magnetic fluctuations

Journal of Geophysical Research-Space Physics, 1998
S Ohtani, K Takahashi, T Higuchi, ATY Lui, HE Spence, JF Fennell, (1998), AMPTE/CCE-SCATHA simultaneous observations of substorm-associated magnetic fluctuations, Journal of Geophysical Research-Space Physics, 103, A3, 4671-4682

Earthward expansion of tail current disruption: Dual-satellite study

Journal of Geophysical Research-Space Physics, 1998
S Ohtani, (1998), Earthward expansion of tail current disruption: Dual-satellite study, Journal of Geophysical Research-Space Physics, 103, A4, 6815-6825

Field-aligned current systems in the magnetospheric ground state

Journal of Geophysical Research-Space Physics, 1998
M Watanabe, T Iijima, M Nakagawa, TA Potemra, LJ Zanetti, S Ohtani, PT Newell, (1998), Field-aligned current systems in the magnetospheric ground state, Journal of Geophysical Research-Space Physics, 103, A4, 6853-6869

Investigation of a substorm following an extended interval of northward interplanetary magnetic field

Magnetospheric Research With Advanced Techniques, 1998
ATY Lui, DJ Williams, RW McEntire, S Ohtani, LJ Zanetti, WA Bristow, RA Greenwald, PT Newell, SP Christon, T Mukai, K Tsuruda, T Yamamoto, S Kokubun, H Matsumoto, H Kojima, T Murata, DH Fairfield, RP Lepping, JC Samson, G Rostoker, GD Reeves, RL Xu, (1998), Investigation of a substorm following an extended interval of northward interplanetary magnetic field, Magnetospheric Research With Advanced Techniques, 9 , 9-16

Multipoint study of a substorm on February 9, 1995

Journal of Geophysical Research-Space Physics, 1998
ATY Lui, DJ Williams, RW McEntire, S Ohtani, LJ Zanetti, WA Bristow, RA Greenwald, PT Newell, SP Christon, T Mukai, K Tsuruda, T Yamamoto, S Kokubun, H Matsumoto, H Kojima, T Murata, DH Fairfield, RP Lepping, JC Samson, G Rostoker, GD Reeves, AL Rodger, HJ Singer, (1998), Multipoint study of a substorm on February 9, 1995, Journal of Geophysical Research-Space Physics, 103, A8, 17333-17343

Plasma and magnetic flux transport associated with auroral breakups

Geophysical Research Letters, 1998
ATY Lui, K Liou, PT Newell, CI Meng, SI Ohtani, T Ogino, S Kokubun, MJ Brittnacher, GK Parks, (1998), Plasma and magnetic flux transport associated with auroral breakups, Geophysical Research Letters, 25, 21, 4059-4062

Drift-shell splitting of energetic ions injected at pseudo-substorm onsets

Journal of Geophysical Research-Space Physics, 1997
K Takahashi, BJ Anderson, S Ohtani, GD Reeves, S Takahashi, TE Sarris, K Mursula, (1997), Drift-shell splitting of energetic ions injected at pseudo-substorm onsets, Journal of Geophysical Research-Space Physics, 102, A10, 22117-22130

Response of the dayside auroral and electrodynamic processes to variations in the interplanetary magnetic field

Journal of Geophysical Research-Space Physics, 1997
S Ohtani, RD Elphinstone, OA Troshichev, M Yamauchi, L Blomberg, LJ Zanetti, TA Potemra, (1997), Response of the dayside auroral and electrodynamic processes to variations in the interplanetary magnetic field, Journal of Geophysical Research-Space Physics, 102, A10, 22247-22260

Altitudinal comparison of dayside field-aligned current signatures by viking and DMSP-F7: Intermediate-scale field-aligned current systems

Journal of Geophysical Research-Space Physics, 1996
S Ohtani, LG Blomberg, PT Newell, M Yamauchi, TA Potemra, LJ Zanetti, (1996), Altitudinal comparison of dayside field-aligned current signatures by viking and DMSP-F7: Intermediate-scale field-aligned current systems, Journal of Geophysical Research-Space Physics, 101, A7, 15297-15310

Dynamic response of the cusp morphology to the solar wind: A case study during passage of the solar wind plasma cloud on February 21, 1994

Journal of Geophysical Research-Space Physics, 1996
M Yamauchi, H Nilsson, L Eliasson, O Norberg, M Boehm, JH Clemmons, RP Lepping, L Blomberg, SI Ohtani, T Yamamoto, T Mukai, T Terasawa, S Kokubun, (1996), Dynamic response of the cusp morphology to the solar wind: A case study during passage of the solar wind plasma cloud on February 21, 1994, Journal of Geophysical Research-Space Physics, 101, A11, 24675-24687

Multisatellite study of nightside transient toroidal waves

Journal of Geophysical Research-Space Physics, 1996
K Takahashi, BJ Anderson, S Ohtani, (1996), Multisatellite study of nightside transient toroidal waves, Journal of Geophysical Research-Space Physics, 101, A11, 24815-24825

4 LARGE-SCALE FIELD-ALIGNED CURRENT SYSTEMS IN THE DAYSIDE HIGH-LATITUDE REGION

Journal of Geophysical Research-Space Physics, 1995
S OHTANI, TA POTEMRA, PT NEWELL, LJ ZANETTI, T IIJIMA, M WATANABE, LG BLOMBERG, RD ELPHINSTONE, JS MURPHREE, M YAMAUCHI, JG WOCH, (1995), 4 LARGE-SCALE FIELD-ALIGNED CURRENT SYSTEMS IN THE DAYSIDE HIGH-LATITUDE REGION, Journal of Geophysical Research-Space Physics, 100, A1, 137-153

MAGNETIC FLUCTUATIONS ASSOCIATED WITH TAIL CURRENT DISRUPTION - FRACTAL ANALYSIS

Journal of Geophysical Research-Space Physics, 1995
S OHTANI, T HIGUCHI, ATY LUI, K TAKAHASHI, (1995), MAGNETIC FLUCTUATIONS ASSOCIATED WITH TAIL CURRENT DISRUPTION - FRACTAL ANALYSIS, Journal of Geophysical Research-Space Physics, 100, A10, 19135-19145

OBSERVATIONS IN THE VICINITY OF SUBSTORM ONSET - IMPLICATIONS FOR THE SUBSTORM PROCESS

Journal of Geophysical Research-Space Physics, 1995
RD ELPHINSTONE, DJ HEARN, LL COGGER, JS MURPHREE, H SINGER, V SERGEEV, K MURSULA, DM KLUMPAR, GD REEVES, M JOHNSON, S OHTANI, TA POTEMRA, I SANDAHL, E NIELSEN, M PERSSON, H OPGENOORTH, PT NEWELL, YI FELDSTEIN, (1995), OBSERVATIONS IN THE VICINITY OF SUBSTORM ONSET - IMPLICATIONS FOR THE SUBSTORM PROCESS, Journal of Geophysical Research-Space Physics, 100, A5, 7937-7969

SIMULTANEOUS PRENOON AND POSTNOON OBSERVATIONS OF 3 FIELD-ALIGNED CURRENT SYSTEMS FROM VIKING AND DMSP-F7

Journal of Geophysical Research-Space Physics, 1995
S OHTANI, TA POTEMRA, PT NEWELL, LJ ZANETTI, T IIJIMA, M WATANABE, M YAMAUCHI, RD ELPHINSTONE, O DELABEAUJARDIERE, LG BLOMBERG, (1995), SIMULTANEOUS PRENOON AND POSTNOON OBSERVATIONS OF 3 FIELD-ALIGNED CURRENT SYSTEMS FROM VIKING AND DMSP-F7, Journal of Geophysical Research-Space Physics, 100, A1, 119-136

SPECIAL FEATURES OF A SUBSTORM DURING HIGH SOLAR-WIND DYNAMIC PRESSURE

Journal of Geophysical Research-Space Physics, 1995
ATY LUI, RD ELPHINSTONE, JS MURPHREE, MG HENDERSON, HB VO, LL COGGER, H LUHR, S OHTANI, PT NEWELL, GD REEVES, (1995), SPECIAL FEATURES OF A SUBSTORM DURING HIGH SOLAR-WIND DYNAMIC PRESSURE, Journal of Geophysical Research-Space Physics, 100, A10, 19095-19107

STATISTICAL-ANALYSIS OF PI-2 PULSATIONS OBSERVED BY THE AMPTE-CCE SPACECRAFT IN THE INNER MAGNETOSPHERE

Journal of Geophysical Research-Space Physics, 1995
K TAKAHASHI, S OHTANI, BJ ANDERSON, (1995), STATISTICAL-ANALYSIS OF PI-2 PULSATIONS OBSERVED BY THE AMPTE-CCE SPACECRAFT IN THE INNER MAGNETOSPHERE, Journal of Geophysical Research-Space Physics, 100, A11, 21929-21941

THE DOUBLE OVAL UV AURORAL DISTRIBUTION .1. IMPLICATIONS FOR THE MAPPING OF AURORAL ARCS

Journal of Geophysical Research-Space Physics, 1995
RD ELPHINSTONE, JS MURPHREE, DJ HEARN, LL COGGER, I SANDAHL, PT NEWELL, DM KLUMPAR, S OHTANI, JA SAUVAUD, TA POTEMRA, K MURSULA, A WRIGHT, M SHAPSHAK, (1995), THE DOUBLE OVAL UV AURORAL DISTRIBUTION .1. IMPLICATIONS FOR THE MAPPING OF AURORAL ARCS, Journal of Geophysical Research-Space Physics, 100, A7, 12075-12092

THE DOUBLE OVAL UV AURORAL DISTRIBUTION .2. THE MOST POLEWARD ARC SYSTEM AND THE DYNAMICS OF THE MAGNETOTAIL

Journal of Geophysical Research-Space Physics, 1995
RD ELPHINSTONE, DJ HEARN, LL COGGER, JS MURPHREE, A WRIGHT, I SANDAHL, S OHTANI, PT NEWELL, DM KLUMPAR, M SHAPSHAK, TA POTEMRA, K MURSULA, JA SAUVAUD, (1995), THE DOUBLE OVAL UV AURORAL DISTRIBUTION .2. THE MOST POLEWARD ARC SYSTEM AND THE DYNAMICS OF THE MAGNETOTAIL, Journal of Geophysical Research-Space Physics, 100, A7, 12093-12102

FREJA CONTRIBUTION TO THE ISTP EVENT OF OCTOBER 27, 1992 - A DISTORTED MAGNETOSPHERE

Geophysical Research Letters, 1994
TA POTEMRA, LJ ZANETTI, BJ ANDERSON, PF BYTHROW, S OHTANI, (1994), FREJA CONTRIBUTION TO THE ISTP EVENT OF OCTOBER 27, 1992 - A DISTORTED MAGNETOSPHERE, Geophysical Research Letters, 21, 17, 1871-1874

MAGNETIC-FIELD EXPERIMENT ON THE FREJA SATELLITE

Space Science Reviews, 1994
L ZANETTI, T POTEMRA, R ERLANDSON, P BYTHROW, B ANDERSON, A LUI, SI OHTANI, G FOUNTAIN, R HENSHAW, B BALLARD, D LOHR, J HAYES, D HOLLAND, M ACUNA, D FAIRFIELD, J SLAVIN, W BAUMJOHANN, M ENGBRETSON, KH GLASSMEIER, G GUSTAFSSON, T IIJIMA, H LUHR, F PRIMDAHL, (1994), MAGNETIC-FIELD EXPERIMENT ON THE FREJA SATELLITE, Space Science Reviews, 70, 3-4, 465-482

PERIODIC LONGITUDINAL STRUCTURE OF FIELD-ALIGNED CURRENTS IN THE DAWN SECTOR - LARGE-SCALE MEANDERING OF AN AURORAL ELECTROJET

Geophysical Research Letters, 1994
S OHTANI, LJ ZANETTI, TA POTEMRA, KB BAKER, JM RUOHONIEMI, ATY LUI, (1994), PERIODIC LONGITUDINAL STRUCTURE OF FIELD-ALIGNED CURRENTS IN THE DAWN SECTOR - LARGE-SCALE MEANDERING OF AN AURORAL ELECTROJET, Geophysical Research Letters, 21, 17, 1879-1882

A MULTISATELLITE STUDY OF A PSEUDO-SUBSTORM ONSET IN THE NEAR-EARTH MAGNETOTAIL

Journal of Geophysical Research-Space Physics, 1993
S OHTANI, BJ ANDERSON, DG SIBECK, PT NEWELL, LJ ZANETTI, TA POTEMRA, K TAKAHASHI, RE LOPEZ, V ANGELOPOULOS, R NAKAMURA, DM KLUMPAR, CT RUSSELL, (1993), A MULTISATELLITE STUDY OF A PSEUDO-SUBSTORM ONSET IN THE NEAR-EARTH MAGNETOTAIL, Journal of Geophysical Research-Space Physics, 98, A11, 19355-19367

DOES THE BALLOONING INSTABILITY TRIGGER SUBSTORMS IN THE NEAR-EARTH MAGNETOTAIL

Journal of Geophysical Research-Space Physics, 1993
S OHTANI, T TAMAO, (1993), DOES THE BALLOONING INSTABILITY TRIGGER SUBSTORMS IN THE NEAR-EARTH MAGNETOTAIL, Journal of Geophysical Research-Space Physics, 98, A11, 19369-19379

ON THE TAILWARD EXPANSION OF CURRENT DISRUPTION DURING SUBSTORMS

Advances in Space Research-Series, 1993
S OHTANI, (1993), ON THE TAILWARD EXPANSION OF CURRENT DISRUPTION DURING SUBSTORMS, Advances in Space Research-Series, 13, 4, 265-268

ON THE TAILWARD EXPANSION OF CURRENT DISRUPTION DURING SUBSTORMS

Auroral and Related Phenomena, 1993
S OHTANI, I Sandahl, MA Saunders, (1993), ON THE TAILWARD EXPANSION OF CURRENT DISRUPTION DURING SUBSTORMS, Auroral and Related Phenomena, 13 , 265-268

ISEE-1 AND ISEE-2 OBSERVATIONS OF AN ISOLATED DIAMAGNETIC EVENT - AN EARTHWARD-MOVING PLASMA BULGE OR A TAIL-ALIGNED FLUX ROPE

Geophysical Research Letters, 1992
S OHTANI, RC ELPHIC, CT RUSSELL, S KOKUBUN, (1992), ISEE-1 AND ISEE-2 OBSERVATIONS OF AN ISOLATED DIAMAGNETIC EVENT - AN EARTHWARD-MOVING PLASMA BULGE OR A TAIL-ALIGNED FLUX ROPE, Geophysical Research Letters, 19, 17, 1743-1746

RADIAL EXPANSION OF THE TAIL CURRENT DISRUPTION DURING SUBSTORMS - A NEW APPROACH TO THE SUBSTORM ONSET REGION

Journal of Geophysical Research-Space Physics, 1992
S OHTANI, S KOKUBUN, CT RUSSELL, (1992), RADIAL EXPANSION OF THE TAIL CURRENT DISRUPTION DURING SUBSTORMS - A NEW APPROACH TO THE SUBSTORM ONSET REGION, Journal of Geophysical Research-Space Physics, 97, A3, 3129-3136

AMPTE CCE OBSERVATIONS OF PI-2 PULSATIONS IN THE INNER MAGNETOSPHERE

Geophysical Research Letters, 1992
K TAKAHASHI, S OHTANI, K YUMOTO, (1992), AMPTE CCE OBSERVATIONS OF PI-2 PULSATIONS IN THE INNER MAGNETOSPHERE, Geophysical Research Letters, 19, 14, 1447-1450

INITIAL SIGNATURES OF MAGNETIC-FIELD AND ENERGETIC PARTICLE FLUXES AT TAIL RECONFIGURATION - EXPLOSIVE GROWTH-PHASE

Journal of Geophysical Research-Space Physics, 1992
S OHTANI, K TAKAHASHI, LJ ZANETTI, TA POTEMRA, RW MCENTIRE, T IIJIMA, (1992), INITIAL SIGNATURES OF MAGNETIC-FIELD AND ENERGETIC PARTICLE FLUXES AT TAIL RECONFIGURATION - EXPLOSIVE GROWTH-PHASE, Journal of Geophysical Research-Space Physics, 97, A12, 19311-19324

MAGNETIC-PROPERTIES OF THE HIGH-LATITUDE TAIL BOUNDARY - DRAPING OF MAGNETOSHEATH FIELD LINES AND TAIL-ALIGNED CURRENT

Journal of Geophysical Research-Space Physics, 1991
S OHTANI, S KOKUBUN, (1991), MAGNETIC-PROPERTIES OF THE HIGH-LATITUDE TAIL BOUNDARY - DRAPING OF MAGNETOSHEATH FIELD LINES AND TAIL-ALIGNED CURRENT, Journal of Geophysical Research-Space Physics, 96, A6, 9521-9530

TAIL CURRENT DISRUPTION IN THE GEOSYNCHRONOUS REGION

Magnetospheric Substorms, 1991
S OHTANI, K TAKAHASHI, LJ ZANETTI, TA POTEMRA, RW MCENTIRE, T IIJIMA, JR KAN, S KOKUBUN, (1991), TAIL CURRENT DISRUPTION IN THE GEOSYNCHRONOUS REGION, Magnetospheric Substorms, 64 , 131-137

FIELD-ALIGNED CURRENT SIGNATURES IN THE NEAR-TAIL REGION .2. COUPLING BETWEEN THE REGION-1 AND THE REGION-2 SYSTEMS

Journal of Geophysical Research-Space Physics, 1990
S OHTANI, S KOKUBUN, R NAKAMURA, RC ELPHIC, CT RUSSELL, DN BAKER, (1990), FIELD-ALIGNED CURRENT SIGNATURES IN THE NEAR-TAIL REGION .2. COUPLING BETWEEN THE REGION-1 AND THE REGION-2 SYSTEMS, Journal of Geophysical Research-Space Physics, 95, A11, 18913-18927

IMP-8 MAGNETIC OBSERVATIONS OF THE HIGH-LATITUDE TAIL BOUNDARY - LOCATIONS AND FORCE BALANCE

Journal of Geophysical Research-Space Physics, 1990
S OHTANI, S KOKUBUN, (1990), IMP-8 MAGNETIC OBSERVATIONS OF THE HIGH-LATITUDE TAIL BOUNDARY - LOCATIONS AND FORCE BALANCE, Journal of Geophysical Research-Space Physics, 95, A12, 20759-20769

BALLOONING INSTABILITY AND STRUCTURE OF DIAMAGNETIC HYDROMAGNETIC-WAVES IN A MODEL MAGNETOSPHERE

Journal of Geophysical Research-Space Physics, 1989
A MIURA, S OHTANI, T TAMAO, (1989), BALLOONING INSTABILITY AND STRUCTURE OF DIAMAGNETIC HYDROMAGNETIC-WAVES IN A MODEL MAGNETOSPHERE, Journal of Geophysical Research-Space Physics, 94, A11, 15231-15242

COUPLING BETWEEN ALFVEN AND SLOW MAGNETOSONIC WAVES IN AN INHOMOGENEOUS FINITE-BETA-PLASMA .1. COUPLED EQUATIONS AND PHYSICAL-MECHANISM

Planetary and Space Science, 1989
S OHTANI, A MIURA, T TAMAO, (1989), COUPLING BETWEEN ALFVEN AND SLOW MAGNETOSONIC WAVES IN AN INHOMOGENEOUS FINITE-BETA-PLASMA .1. COUPLED EQUATIONS AND PHYSICAL-MECHANISM, Planetary and Space Science, 37, 5, 567-577

COUPLING BETWEEN ALFVEN AND SLOW MAGNETOSONIC WAVES IN AN INHOMOGENEOUS FINITE-BETA-PLASMA .2. EIGENMODE ANALYSIS OF LOCALIZED BALLOONING-INTERCHANGE INSTABILITY

Planetary and Space Science, 1989
S OHTANI, A MIURA, T TAMAO, (1989), COUPLING BETWEEN ALFVEN AND SLOW MAGNETOSONIC WAVES IN AN INHOMOGENEOUS FINITE-BETA-PLASMA .2. EIGENMODE ANALYSIS OF LOCALIZED BALLOONING-INTERCHANGE INSTABILITY, Planetary and Space Science, 37, 5, 579-588

FIELD-ALIGNED CURRENT SIGNATURES IN THE NEAR-TAIL REGION .1. ISEE OBSERVATIONS IN THE PLASMA SHEET BOUNDARY-LAYER

Journal of Geophysical Research-Space Physics, 1988
S OHTANI, S KOKUBUN, RC ELPHIC, CT RUSSELL, (1988), FIELD-ALIGNED CURRENT SIGNATURES IN THE NEAR-TAIL REGION .1. ISEE OBSERVATIONS IN THE PLASMA SHEET BOUNDARY-LAYER, Journal of Geophysical Research-Space Physics, 93, A9, 9709-9720

HARMONIC STRUCTURE OF COMPRESSIONAL PC5 PULSATIONS AT SYNCHRONOUS ORBIT

Geophysical Research Letters, 1986
T HIGUCHI, S KOKUBUN, S OHTANI, (1986), HARMONIC STRUCTURE OF COMPRESSIONAL PC5 PULSATIONS AT SYNCHRONOUS ORBIT, Geophysical Research Letters, 13, 11, 1101-1104

Formation of Beading Auroral Arcs at Substorm Onset: Implications of Its Variability Into the Generation Process