Results 61 to 70 of about 501,910 (164)

Rapid Reversal of Hemispheric Asymmetry in the Intensity of EIA Crests During the Geomagnetic Storm of 23 April 2023: A Unique Observation From GOLD

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract This study, using the peak electron density of Ionospheric F‐region from the Global‐scale Observations of the Limb and Disk reports, for the first time, a unique phenomenon: the rapid reversal of the intensity of the Equatorial Ionization Anomaly (EIA) crests between the hemispheres during the main phase of 23 April 2023, geomagnetic storm ...
K. Shimna, R. K. Archana, C. Vineeth, Gang Lu, T. K. Pant, M. S. M. Vijayan   +5 more
wiley   +1 more source

Self‐Regulating Feedback Between Field Line Curvature Scattering, Ring Current Pressure, and Magnetic Configuration

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract We incorporate field line curvature (FLC) scattering into a kinetic ring current model two‐way coupled with a global magnetospheric MHD model to investigate its role in SYM‐H prediction and global magnetospheric dynamics. FLC scattering reduces plasma pressure in regions where the ion gyroradius is comparable to the local FLC radius.
Suk‐Bin Kang, Alex Glocer, Mei‐Ching Fok, Cristian P. Ferradas, Natalia Buzulukova, Gonzalo Cucho‐Padin   +5 more
wiley   +1 more source

Responses of Field‐Aligned Currents and Equatorial Electrojet to Sudden Decrease of Solar Wind Dynamic Pressure During the March 2023 Geomagnetic Storm

Geophysical Research Letters
We present the observations of field‐aligned currents and the equatorial electrojet during the 23 March 2023 magnetic storm, focusing on the effect of the drastic decrease of the solar wind dynamic pressure occurred during the main phase.
Guan Le, Guiping Liu, Endawoke Yizengaw, Chin‐Chun Wu, Yihua Zheng, Sarah Vines, Natalia Buzulukova   +6 more
doaj   +1 more source

Magnetosphere-Ionosphere Coupling Through E-region Turbulence 1: Energy Budget

, 2011
During periods of intense geomagnetic activity, strong electric fields and currents penetrate from the magnetosphere into high-latitude ionosphere where they dissipate energy, form electrojets, and excite plasma instabilities in the E-region ionosphere ...
Amm, Ashrafi, Bahcivan, Bahcivan, Balsley, Buchert, Buneman, Cohen, Crochet, D'Angelo, Dimant, Dimant, Dimant, Dimant, Dimant, Dimant, Erukhimov, Farley, Farley, Fejer, Fontenla, Foster, Fukao, Gogoberidze, Guild, Gurevich, Hamza, Hamza, Hoh, John, Kagan, Kagan, Kelley, Koepke, Kudeki, Landau, Liperovsky, M. M. Oppenheim, Maeda, Merkin, Merkin, Merkin, Milikh, Milikh, Ober, Oppenheim, Pfaff, Pfaff, Pfaff, Pfaff, Providakes, Raeder, Raeder, Robinson, Robinson, Rogister, Rose, Schlegel, Schunk, Siscoe, St.-Maurice, St.-Maurice, St.-Maurice, St.-Maurice, Stauning, Vanhamäki, Wahlund, Wang, Williams, Winglee, Y. S. Dimant   +70 more
core   +1 more source

A Personal Voyage Among Earth and Space Physics Disciplines

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract I have organized my thoughts in an autobiographical way in relation to the several distinct phases of my career encompassing Earth and space physics. I discuss atmospheric and space physics topics of interest to me in an international context, and I emphasize the value of community activities and international conferences for the interchange ...
Michael J. Rycroft
wiley   +1 more source

Simultaneous transients in the auroral zone and the equator as observed with SuperDARN and magnetometers: A correlation with equatorial counter electrojet (CEJ) event [PDF]

, 2000
An equatorial counter electrojet (CEJ) event characterized by a large amplitude (～150 nT) and a short duration (～15 min) magnetic disturbance occurred in the dayside region at 0053 UT, 23 October 1994.
Hiroshi Tachihara, J.M. Ruohoniemi, Manabu Shinohara, N.B. Trivedi,N.B., Natsuo Sato, Osuke Saka, R.A. Greenwald, Tai-ichi Kitamura   +7 more
core   +1 more source

A Long‐Term Study of the Variability of Polar Cap Patches Using Advanced Modular Incoherent Scatter Radars (AMISRs)

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract The polar cap ionosphere is a dynamic and intricately structured environment that plays host to polar cap patches (PCPs) and other mesoscale density formations. These phenomena can lead to the emergence of smaller‐scale structures through various plasma instability mechanisms.
Olusegun F. Jonah, Leslie Lamarche, Gareth Perry, Taylor Cameron   +3 more
wiley   +1 more source

Variations of geomagnetic H, D, and Z field intensities on quiet days at west african latitudes

Moldavian Journal of the Physical Sciences, 2009
In the framework of the French participation to the International Equatorial Electrojet Year (IEEY), a network of ten electro-magnetic stations was installed at African latitudes. These stations measured digitally the three components of the magnetic
Obiekezie, T., Okeke, F.
doaj  

Stormtime Magnetospheric Processes Associated With the Dawnside Current Wedge

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract The intensification of the westward auroral electrojet (AEJ) in the dawn sector is a characteristic feature of the storm main phase. It is considered an ionospheric segment of a wedge‐type current system, the dawnside current wedge (DCW), formed by the disruption (short‐circuiting through the ionosphere) of a magnetospheric equatorial current.
S. Ohtani, S. Raptis, A. P. Devanandan, T. Motoba, Y. Zou, J. W. Gjerloev, V. G. Merkin   +6 more
wiley   +1 more source

Empirical Model of Equatorial ElectroJet (EEJ) Using Long‐Term Observations From the Indian Sector

Space Weather
The Equatorial Electrojet (EEJ) is one of the important near‐earth space weather phenomena which exhibits significant diurnal, seasonal and solar activity variations.
S. Tulasi Ram, M. Ankita, B. Nilam, S. Gurubaran, Manoj Nair, Gopi K. Seemala, P. S. Brahmanandam, A. P. Dimri   +7 more
doaj   +1 more source