Results 91 to 100 of about 118,766 (238)

Geomagnetic storms and electric fields in the equatorial ionosphere

, 1977
Large variations of the geomagnetic field observed at ground level during a geomagnetic storm are generally attributed to various magnetospheric changes following the arrival of the solar plasma ejected during the solar flare.
R. G. RASTOGI, Rastogi, R. G.
core   +1 more source

Statistical Analysis of the Equatorward UV Auroral Emissions of the Jovian Southern Hemisphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study presents a comprehensive statistical analysis of Jupiter's southern UV auroral emissions, with a focus on the secondary oval and equatorward injection signatures. Utilizing Hubble Space Telescope (HST) data, the frequency, location, and intensity of these auroral features are systematically evaluated, considering their variation ...
Diego Moral‐Pombo, Sarah V. Badman, Licia C. Ray   +2 more
wiley   +1 more source

Day‐to‐Day Variability of Prereversal Enhancement in the Vertical Ion Drift in Response to Large‐Scale Forcing From the Lower Atmosphere

Space Weather, 2020
Equatorial plasma bubbles (EPBs) are plasma density irregularities found in the equatorial ionosphere after sunset and are closely related to the upward E×B drift before it reverses to the generally downward direction at nighttime, referred to as ...
Han‐Li Liu
doaj   +1 more source

Rocket observations of electron-density irregularities in the equatorial ionosphere below 200 km [PDF]

, 1978
Nike Apache rockets carring instrumentation to measure electron density and its fine structure in the equatorial ionosphere were launched from Chilca, Peru in May and June 1975.
Klaus, D. E., Smith, L. G.
core  

Earthward O+ Injections in the Plasma Sheet Boundary Layer During Geomagnetic Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract During geomagnetic storms, energetic ions are injected from the Earth's magnetotail along the plasma sheet boundary layer (PSBL). Owing to its off‐equatorial inclined orbit, the Arase satellite is in a prime position to observe these injections in the PSBL on the nightside at the apogee.
M. M. H. Kalliokoski, L. M. Kistler, K. Asamura, S. Kasahara, Y. Miyoshi, K. Keika, T. Hori, A. Matsuoka, K. Yamamoto, J. Liao   +9 more
wiley   +1 more source

Kelvin–Helmholtz Spectral Redistribution by Flow and Density Structure at the Dusk Dayside Magnetopause

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract We study the development of the Kelvin‐Helmholtz instability (KHI) along the dusk dayside Earth's magnetopause with and without the presence of enhanced plasma density at the shear interface. Using three‐dimensional MAGE global simulations, we establish general KHI growth rate diagrams, which depend sensitively on the transverse profiles of ...
G. Peyrichon, J.‐F. Ripoll, H. El‐Rabii, A. T. Michael, V. G. Merkin, M. Cosmides, K. Sorathia, F. R. Toffoletto, A. Y. Ukhorskiy   +8 more
wiley   +1 more source

Characterization of High‐Frequency GNSS Total Electron Content Variations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Global Navigation Satellite System (GNSS)–derived Total Electron Content (TEC) is widely used to investigate ionospheric variability, but has primarily been applied to low‐frequency fluctuations. Here we present a long‐term statistical characterization of high‐frequency (30–500 mHz) TEC variations using multi‐constellation GNSS data from 11 ...
J. Pérez‐Coll Jiménez, N. Ivchenko, N. Partamies, M. Håkansson   +3 more
wiley   +1 more source

Multi-process driven unusually large equatorial perturbation electric fields during the April 2023 geomagnetic storm

Frontiers in Astronomy and Space Sciences
The low latitude ionosphere and thermosphere are strongly disturbed during and shortly after geomagnetic storms. We use novel Jicamarca radar measurements, ACE satellite solar wind, and SuperMAG geomagnetic field observations to study the electrodynamic ...
Bela G. Fejer, Sophia R. Laranja, Sophia R. Laranja, Percy Condor   +3 more
doaj   +1 more source

Effects of the equatorial ionosphere on L-band Earth-space transmissions [PDF]

, 1993
Ionosphere scintillation can effect satellite telecommunication up to Ku-band. Nighttime scintillation can be attributed to large-scale inhomogeneity in the F-region of the ionosphere predominantly between heights of 200 and 600 km. Daytime scintillation
Flock, Warren L., Smith, Ernest K.
core  

Coupled Thermosphere–Ionosphere–Plasmasphere Disturbances During the April 2023 Geomagnetic Storm: A Ground‐Based Multiparametric Study Across the American and European Sectors

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The April 2023 geomagnetic storm significantly impacted the thermosphere‐ionosphere system, particularly over South America and midlatitude regions. This study analyzes ground‐based geomagnetic and ionospheric data, alongside Swarm satellite measurements, to investigate the physical mechanisms driven by intense solar wind energy input ...
L. Perrone, M. Regi, G. Carnevale, C. Scotto, D. Sabbagh, A. Ippolito, A. Del Corpo, D. Sciarra, B. Heilig   +8 more
wiley   +1 more source