Results 111 to 120 of about 118,766 (238)

STORM-TIME VARIATIONS OF ELECTRON CONCENTRATION IN THE EQUATORIAL TOPSIDE IONOSPHERE [PDF]

, 1974
Storm-time variations of the topside ionosphere in equatorial latitudes over the American zone are examined, by using Alouette I sounding data. Three typical types of variations of electron concentration during geomagnetic storms are recognized.
Takayoshi Inoue, INOUE, Takayoshi, Tegil Cho, CHO, Tegil   +3 more
core  

OI 630 nm Airglow Observed From Space as a Diagnostic of Nighttime Low‐Latitude Ionospheric Dynamics

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study investigates the nighttime morphology of the bottomside F region (∼250 km) at low latitudes using 630 nm airglow measurements from the Visible and Infrared Spectral Imager (VISI) aboard the Ionosphere, Mesosphere, Upper Atmosphere, and Plasmasphere (IMAP) mission on the International Space Station. For this purpose, we analyzed IMAP/
Hyosub Kil, Se‐Heon Jeong, Jeong‐Heon Kim, Woo Kyoung Lee, Young‐Sil Kwak, Akinori Saito, Takeshi Sakanoi   +6 more
wiley   +1 more source

Equatorial ionosphere-thermosphere system during geomagnetic storms

, 2003
This paper presents the recent progress in understanding the behavior of the structure and dynamics of the equatorial ionosphere-thermosphere system (EITS) under disturbed geomagnetic conditions.
Pant, Kumar T., Sastri, Hanumath J., Sridharan, R.   +2 more
core   +1 more source

Key Parameters for the Ionospheric Detection of Tsunamis From the 29 July 2025 Kamchatka Event

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract It has been demonstrated that tsunamis generate internal gravity waves (GWs) detectable in the ionosphere within 20–60 min after their generation at the ocean surface. Despite numerous simulation and observation studies on ionospheric signatures of tsunamis, the detection of Co‐tsunamic Ionospheric Disturbances (CTIDs) and distinguishing them ...
Clélia Maréchal, Elvira Astafyeva, Lucie Rolland, Anthony Sladen, Boris Maletckii   +4 more
wiley   +1 more source

Equatorial and low latitude ionosphere thermosphere interactions [PDF]

, 1998
Over the recent years the equational and low latitude phenomena in the upper atmosphere have been drawing the attention of Aeronomers and space scientists world-wide.
Shridharan, R.
core  

A Mechanism for the Generation of Enhanced Fluxes at Discrete Energies on the Wakes of the Galilean Moons

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract In this study, we propose a new mechanism to explain the observed particle flux at discrete energies in the flux tubes connecting to the wakes of the Galilean moons, first reported by Sarkango et al. (2024, https://doi.org/10.1029/2023gl107431) and referred to as “banded flux.” We demonstrate the proposed mechanism using test particle ...
W. W. Eshetu, R. L. Lysak, Y. Sarkango, A. H. Sulaiman, J. R. Szalay   +4 more
wiley   +1 more source

Local time dependant response of Indian equatorial ionosphere to the moderate geomagnetic storms

, 2007
The electrodynamics and neutral dynamics of the equatorial ionosphere undergo significant changes during geo-magnetically disturbed periods as a result of the high and low latitude electro-dynamical coupling.
Prasad, D. S. V. V. D., Devasia, C. V., Niranjan, K., Tulasi Ram, S., Ravindran, Sudha, Sridharan, R., Rama Rao, P. V. S.   +6 more
core   +1 more source

Nighttime Westward Equatorial Electrojet Observed During the January 2026 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The equatorial electrojet (EEJ) is a narrow band of zonal electric current flowing in the E‐region ionosphere within approximately ±2° $\pm 2{}^{\circ}$ latitude of the magnetic equator. At night, the EEJ is generally considered very weak because of low ionospheric conductivity.
Y. Yamazaki, M. V. da Silva, J. Matzka, G. B. Soares, A. Grayver, D. R. Themens, S. K. Das, C. Stolle, A. Maute, S. Perwitasari, M. Nishioka, R. Kaewthongrach, S. Channumsin, Y. Setiawan, M. Syirojudin, X. Yue, A. Yoshikawa, S. Abe, K. Girgis, R. Flores, F. Justo, J. Inostroza, G. Vichare, G. Seemala, A. Nel, N. M. Giday, A. Samy   +26 more
wiley   +1 more source

A Global Lithospheric Magnetic Field Model Derived From Multi‐Satellite Gradient Observations and Regional Aeromagnetic Data

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract Using gradient data from the Macau Science Satellite‐1 (MSS‐1), CHAMP, Swarm‐A, and Swarm‐C satellites, together with aeromagnetic model data from China, we built the China‐specific Global Gradient Lithospheric Magnetic Model (CGGLM). The new model reaches spherical harmonic degree 140 and uses the Iteratively Re‐weighted Least‐Squares method ...
Yuxuan Lin, Yan Feng, Jiaxuan Zhang, Pan Zhang, Xinwu Li, Ya Huang   +5 more
wiley   +1 more source

Coherent radio beacon experiment (CRABEX) for tomographic imaging of the equatorial ionosphere in the Indian longitudes - Preliminary results

, 2007
To investigate the equatorial ionospheric processes like the equatorial ionization anomaly (EIA), equatorial spread F (ESF) and their inter relationships, a network of ground based stations receiving the 150 and 400 MHz transmissions from the low earth ...
Sastri, J. H., Sarma, A. D., Pant, Tarun K., Devasia, C. V., Jose, Jessy, Thampi, Smitha V., Ravindran, Sudha, Sreelatha, P., Venkata Ratnam, D., Sridharan, R., Raghava Reddi, C.   +10 more
core   +1 more source