Results 71 to 80 of about 2,664 (215)

Pre-seismic ionospheric anomalies detected before the 2016 Taiwan earthquake [PDF]

, 2019
On Feb. 5 2016 (UTC), an earthquake with moment magnitude 6.4 occurred in southern Taiwan, known as the 2016 (Southern) Taiwan earthquake. In this study, evidences of seismic earthquake precursors for this earthquake event are investigated.
Chen, Chia-Hung, Goto, Shin-itiro, Igarashi, Kiyoshi, Kao, Minghui, Uchida, Ryoma, Umeno, Ken   +5 more
core   +2 more sources

Radio Pulse Power Distribution of Lightning in Jupiter's 2021–2022 Stealth Superstorms

AGU Advances, Volume 7, Issue 2, April 2026.
Abstract Surveys and observations of lightning on Jupiter prior to the NASA Juno mission used night‐side imaging approaches, and a common conclusion was that the optical energy was similar to the highest energy terrestrial lightning flashes, or superbolts.
Michael H. Wong, Ivana Kolmašová, Fabiano A. Oyafuso, Masafumi Imai, Shinji Mizumoto, Steven M. Levin, Ramanakumar G. Sankar, Amy A. Simon, Shawn Brueshaber, Glenn S. Orton, Sushil K. Atreya, Cheng Li, Scott J. Bolton   +12 more
wiley   +1 more source

Wavelet analysis of the ionospheric response at mid-latitudes during the April 200 storm using magnetograms and vTEC from GPS [PDF]

, 2013
In this work we pursue the idea of computing a parameter that allows us to estimate the local ionospheric response to a geospheric event that triggers an ionospheric storm. For that, wavelet technique has been chosen because of its ability to analyze non-
Fernandez, Laura Isabel, Meza, Amalia Margarita, Van Zele, Maria Andrea   +2 more
core  

Modeling the ionospheric response to traveling atmospheric disturbances [PDF]

Journal of Geophysical Research: Space Physics, 1997
Anomalous increases of the ionization density at middle latitudes (positive ionospheric storms) are often a prominent feature of upper atmospheric storms. One of their possible causes are traveling atmospheric disturbances (TADs) which propagate from polar to equatorial latitudes, carrying along equatorward‐directed meridional winds.
R. Bauske, G. W. Prölss
openaire   +1 more source

Dataset of Quiet Space Weather Periods for Ionospheric Studies

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract The ionosphere is a dynamic environment regularly affected from above and from below. This study identifies periods within the years 2000–2023 when the impact from above, driven by space weather, was minimal. The quiet space weather periods have wide usage for two types of ionospheric studies. At first, studies of isolated space weather events
Šimon Mackovjak, Silvia Kostárová, Jaroslav Chum, Carsten Schmidt, Patrick Hannawald, Sabine Wüst, Lisa Küchelbacher, Vladimír Truhlík, Petra Koucká Knížová, Jaroslav Urbář, Lukáš Randuška, Filip Štempel, Ján Kubančák   +12 more
wiley   +1 more source

OH Airglow for Ionospheric Seismology Applications—From Instrumental Noise Characterization to Rayleigh Waves Detection Threshold

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Airglow layers are powerful tracers of upper‐atmosphere dynamics because of their sensitivity to a broad spectrum of atmospheric wave phenomena. Seismic activity, and in particular Rayleigh waves, constitutes a forcing mechanism capable of generating infrasonic waves in the atmosphere.
P.‐Y. Froissart, P. Lognonné, P. Simoneau, K. Nishida, T. Ohminato   +4 more
wiley   +1 more source

Travelling Ionospheric Disturbances in the F Region [PDF]

Australian Journal of Physics, 1958
Observations of the horizontal movements of travelling ionospheric disturbances recorded on a single radio frequency from April 1948 to March 1957 are analysed for seasonal and diurnal variations of occurrence and of direction and speed of travel. Recording was mainly in daylight hours but some limited night results are included.
openaire   +1 more source

Imprint of the Quasi‐Biennial Oscillation on the Ionosphere and Thermosphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The Quasi‐Biennial Oscillation (QBO) is a dominant mode of stratospheric variability and is known to modulate the variability of the ionosphere‐thermosphere (IT) system. However, the extent of its influence on the ionosphere‐thermosphere system remains uncertain due to weak signals and confounding with similar periodicities in solar flux.
D. Singh, L. P. Goncharenko, S. R. Zhang
wiley   +1 more source

Investigation of ionospheric response to a moderate geomagnetic storm over the mid-latitude of Saudi Arabia

Open Astronomy
This study investigated the ionospheric response to a moderate geomagnetic storm recorded on May 14, 2019, with a minimum disturbance storm time (Dst) index of −70-70 nT. Observations from three Global Positioning System (GPS) stations (RFHA, 29.6∘{\text{
Alenazi Moqbil Salem, Nooreldeen Hassan Mahdy, Ahmed Ayman Mahmoud, Yossuf Mohamed, Lomotey Solomon Otoo, Yassen Ahmed, Mahrous Ayman   +6 more
doaj   +1 more source

Cold ions of ionospheric origin observed at the dayside magnetopause and their effects on magnetic reconnection [PDF]

, 2015
Thesis (Ph.D.) University of Alaska Fairbanks, 2015Magnetic reconnection at the dayside magnetopause is one of the most important mechanisms that efficiently transfers solar wind particles, momentum, and energy into the magnetosphere.
Lee, Sun-Hee, 이, 선희
core