Shin-ichi Ohtani Print


  240-228-3641

  Shin.Ohtani@jhuapl.edu

: SES

:   space physicist

:  Heliophysics

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Degree Field of Study Year Attained Institution Name
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.

 
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Start Year End Year Description
1991 Current Johns Hopkins University Applied Physics Laboratory
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The following publication information was downloaded from

ORCID logo https://orcid.org/0000-0002-9565-6840

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Christopher T. Russell, Jesper Gjerloev, Shin Ohtani, Audrey Schillings, Hermann Opgenoorth, Howard J. Singer, David H. Boteler, Martin G. Connors, Mark B. Moldwin, Erik S. Steinmetz, Viacheslav A. Pilipenko, Mark J. Engebretson, (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

, (2021), Globally Correlated Ground Magnetic Disturbances During Substorms, Journal of Geophysical Research: Space Physics

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

, (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

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

M. Wiltberger, M. Sitnov, S. Ohtani, A. Y. Ukhorskiy, J. Garretson, J. G. Lyon, B. Zhang, E. Panov, V. G. Merkin, K. A. Sorathia, (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

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

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

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

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

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

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

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

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

, (2019), Low‐Energy (
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

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

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

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

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

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

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

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

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

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

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

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

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

A. Yoshikawa, S. Ohtani, (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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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