Results 71 to 80 of about 6,013 (205)

The Equatorial Electrojet

, 2021
The equatorial electrojet (EEJ) represents a ribbon of intense electric current flowing in the ionospheric E region on the dayside along the dip-equator. The primary reason for the high current density is the geometry of the geomagnetic field with its horizontal field lines at these latitudes.
Lühr, H., Alken, P., Zhou, Y.
openaire   +2 more sources

Localized Threats: How Ground Conductivity Shapes the Geoelectric Response

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Geomagnetic storms can induce strong geoelectric fields in the ground. These fields drive geomagnetically induced currents in technological conductor systems, such as power grids. In this study, we analyze 4‐hr periods of two such major geomagnetic storms: the Halloween storm (29–31 October 2003) and the 7–8 September 2017 storm.
M. Kellinsalmi, E. Marshalko, L. Juusola, A. Viljanen   +3 more
wiley   +1 more source

Spatial and temporal variations of small-scale plasma turbulence parameters in the equatorial electrojet: HF and VHF radar observational results [PDF]

Annales Geophysicae, 2005
The spatial and temporal variations of various parameters associated with plasma wave turbulence in the equatorial electrojet (EEJ) at the magnetic equatorial location of Trivandrum (8.5° N, 77° E; dip 0.5° N) are studied for the first ...
G. Manju, K. S. Viswanathan, S. Ravindran   +2 more
doaj   +1 more source

Polarization of the auroral electrojet [PDF]

Journal of Geophysical Research, 1972
Consideration of an idealized model of electrojet polarization. Precipitation from the inner edge of the electron plasma sheet creates a density maximum in the auroral-oval ionosphere, which in turn leads to Hall and Pedersen conductance maximums. It is then assumed that a uniform westward convection electric field is imposed on the lower ionosphere ...
F. V. Coroniti, C. F. Kennel
openaire   +1 more source

Comparison of Geoelectric Fields Computed by the Complex Image, Magnetotelluric, and Finite‐Difference Time‐Domain Methods

Space Weather, Volume 24, Issue 3, March 2026.
Abstract It is important to be able to accurately predict geoelectric field behavior so that potential space weather hazards to large grounded infrastructure, such as electric power grids, smart grids, oil and gas pipelines, and railway systems, can be better understood.
Prashanna S. Paneru, Darcy Cordell, Jamesina J. Simpson, Mark B. Moldwin   +3 more
wiley   +1 more source

Quasi‐4‐Day Waves During the 2018/2019 SSW and Their Coupling to the Ionosphere Based on Whole Atmosphere Data Assimilation

Space Weather, Volume 24, Issue 3, March 2026.
Abstract A strong westward zonal wavenumber‐2 quasi‐4‐day wave (Q4DW) during the 2018/2019 Northern Hemisphere sudden stratospheric warming (SSW) is both captured by Aura Microwave Limb Sounder (MLS) observations and our new whole neutral atmosphere data assimilation system.
Wenxuan Wang, Xiankang Dou, Sheng‐Yang Gu, Yusong Qin, Yuxuan Liu, Hao Chen, Bao Zhang   +6 more
wiley   +1 more source

Spatial frequencies associated with the latitudinal structures of ionospheric currents seen by CHAMP satellite

, 2015
The CHAMP magnetic field variations during international quiet days of low solar activity period 2008-2009 are investigated. The present paper reports the existence of frequency-peaks < 20 mHz in the compressional component of the magnetic field in ...
Sinha, A. K., Thomas, Neethal, Vichare, Geeta   +2 more
core   +1 more source

Testing the SOC hypothesis for the magnetosphere [PDF]

, 2000
As noted by Chang, the hypothesis of Self-Organised Criticality provides a theoretical framework in which the low dimensionality seen in magnetospheric indices can be combined with the scaling seen in their power spectra and the recently-observed plasma ...
Angelopoulos, Angelopoulos, Aschwanden, Bak, Bak, Bak, Bak, Baker, Baker, Baker, Bargatze, Bendat, Boffetta, Cardy, Carreras, Chang, Chang, Chapman, Chapman, Consolini, Davis, Dendy, Dendy, Einaudi, Freeman, Freeman, Grassberger, Hastings, Horbury, Horton, Horton, Huang, Hwa, Jensen, Jensen, Kamide, Katz, Klimas, Klimas, Lichtenberg, Lu, M.P Freeman, Malamud, N.W Watkins, Osborne, Palmer, Pedrosa, Pelletier, Pinho, R.O Dendy, Roberts, Rodríguez-Iturbe, Rowlands, S.C Chapman, Takalo, Takalo, Takalo, Tsurutani, Uritsky, Vassiliadis, Vörös, Vörös, Watkins, Zapperi, Zelenyi   +64 more
core   +2 more sources

Analysis on Global Es Layer Response to the May 2024 Geomagnetic Storm Through a Combination of Tianmu‐1 and COSMIC‐2 Radio Occultation Observations

Space Weather, Volume 24, Issue 3, March 2026.
Abstract The sporadic E (Es) layer, a key manifestation of ionosphere‐neutral atmosphere coupling, is highly sensitive to geomagnetic storms. Using more than 25,000 daily radio occultation profiles from the Tianmu‐1 and COSMIC‐2 constellations, this study investigates the global response of the Es layer to the May 2024 storm.
Sheng Guo, Sicheng Wang, Lei Shi, Zheng Sheng, Jia Bu   +4 more
wiley   +1 more source

Explicit IMF $B_y$-effect maximizes at subauroral latitudes (Dedicated to the memory of Eigil Friis-Christensen)

, 2019
The most important parameter in the coupling between solar wind and geomagnetic activity is the $B_z$-component of the interplanetary magnetic field (IMF).
Gopalswamy, Nat, Holappa, Lauri, Mursula, Kalevi   +2 more
core   +1 more source