Results 61 to 70 of about 369 (184)

Post‐Sunset Merging of Equatorial Ionization Anomaly Crests Into a Single Peak Over ∼35° Longitude During the 19 January 2026 Geomagnetic Superstorm

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract We investigate the nighttime equatorial ionosphere during the 19 January 2026 geomagnetic storm using Global‐scale Observations of the Limb and Disk OI 135.6 nm observations and ground‐based GPS Total Electron Content. The observations reveal a pronounced longitudinal asymmetry in the post‐sunset equatorial ionization anomaly (EIA).
Deepak K. Karan, Richard W. Eastes, Kuldeep Pandey, Wenbin Wang, Carlos R. Martinis, Robert E. Daniell, Quan Gan   +6 more
wiley   +1 more source

On the Generation of Pre‐Sunrise Equatorial Plasma Bubbles in Southeast Asia During the Geomagnetic Storm of May 2024

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract A set of fresh Equatorial Plasma Bubbles (EPBs) formed during pre‐sunrise hours in the Southeast Asian sector amid the recovery phase of May 2024 geomagnetic storm. They offered new insights into their formation mechanism. This study used Total Electron Content (TEC) and Rate of TEC Index maps over Indonesia, along with ionosondes in Thailand ...
Sri Ekawati, Prayitno Abadi, Takuya Sori, Rezy Pradipta, Ihsan Naufal Muafiry, Teguh Nugraha Pratama, Agri Faturahman, Noersomadi, Febrylian Fahmi Chabibi, Punyawi Jamjareegulgarn   +9 more
wiley   +1 more source

Polytropic Index and Thermodynamic Behavior of the Central Plasma Sheet Near Lunar Distances

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract In addition to making near‐Earth observations, the THEMIS/ARTEMIS mission is uniquely positioned at lunar distance, in the deep magnetotail, reaching distances of 60 RE ${R}_{E}$ and further. This vantage point allows ARTEMIS to access the plasma sheet and measure entropy evolution across convective channels, plasma flow gradients ...
Ephrem Tesfaye Desta, R. D. Strauss, N. E. Engelbrecht   +2 more
wiley   +1 more source

Theta Aurora: Transpolar Arcs Linked to a Folded Magnetotail Neutral Sheet

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Nightside‐originating transpolar arcs (TPAs) represent a distinct mechanism of magnetosphere‐ionosphere energy transfer during northward IMF conditions. Nightside‐originating TPAs originate from the nightside auroral oval and grow across the polar cap to connect to the dayside, appearing to cross multiple topological boundaries as they develop.
S. C. Hill, T. I. Pulkkinen, A. Kullen, A. Brenner, M. Ala‐Lahti, Q. Al Shidi, A. Mukhopadhyay, S. Zou, M. Liemohn, A. N. Jaynes   +9 more
wiley   +1 more source

Radar profiles of the equatorial electrojet

Geophysical Research Letters, 1976
The electrojet current deduced from radar measurements was found in the past to present large E‐W variations near the coast of Peru. New measurements in Africa indicate that the electrojet shows no anomalous variations with longitude in Central Africa while a large E‐W asymmetry is detected in East Africa near the Red Sea.
M. Crochet, C. Poman, C. Hanuise
openaire   +1 more source

IONOSPHERIC E- AND F-REGION DYNAMOS AND THEIR EFFECTS ON THE EQUATORIAL ELECTROJET

Brazilian Journal of Geophysics, 1993
A dynamo model, where the E- and the F-region dynamos interact through the flow of currents along the geomagnetic field lines is used to generate the seed electric field for the equatorial electrojet.
E. Bonelli, M.A.G. Carvalho
doaj   +1 more source

How Does the Magnetosphere‐Ionosphere Current System Respond to Solar Flares?

Geophysical Research Letters
While the isolated effects of solar flares on low‐latitude ionospheric electrodynamics have been well documented, the coupled system response of the equatorial electrojet (EEJ), auroral electrojet (AEJ), field‐aligned currents (FACs), and asymmetric ring
Hongkai Tang, Jing Liu, Xuanqing Liu, Xiangyu Niu, Jiawei Zhang, Shuhan Li   +5 more
doaj   +1 more source

Equatorial electrojet dependence on solar activity in the Southeast Asia sector

Antarctic Record, 2013
A:The equatorial electrojet (EEJ) is a current system caused by the enhanced ionospheric conductivity near the dayside magnetic dip equator. We examined the dependence of the EEJ on solar activity, represented by the 10.7 cm solar radio flux (F10.7). For
Nurul Shazana Abdul Hamid, Huixin Liu, Teiji Uozumi, Kiyohumi Yumoto   +3 more
doaj   +1 more source

An investigation of solar flare effects on equatorial ionosphere and thermosphere using co-ordinated measurements

Earth, Planets and Space, 2019
The response of equatorial ionosphere–thermosphere system to the X3.8 solar flare of January 17, 2005 has been studied using the coordinated measurements of GPS-derived Total Electron Content (TEC), OI 630.0 nm dayglow and magnetic field measurements ...
S. G. Sumod, Tarun Kumar Pant
doaj   +1 more source

Unveiling the combined effects of neutral dynamics and electrodynamic forcing on dayside ionosphere during the 3-4 February 2022 "SpaceX" geomagnetic storms. [PDF]

Sci Rep, 2023
Kakoti G, Bagiya MS, Laskar FI, Lin D.
europepmc   +1 more source