Results 31 to 40 of about 1,292 (208)

Concurrent Effects between Geomagnetic Storms and Magnetospheric Substorms

Universe, 2022
An accurate understanding of dissimilarities in geomagnetic variability between quiet and disturbed periods has the potential to vastly improve space weather diagnosis.
Tommaso Alberti, Davide Faranda, Giuseppe Consolini, Paola De Michelis, Reik V. Donner, Vincenzo Carbone   +5 more
doaj   +1 more source

New Regional Geomagnetic Indices for the Russian Sector of the Geomagnetic Observation Network

Russian Journal of Earth Sciences
It was proposed to introduce new regional geomagnetic indices SME-R and VAR characterizing the values of the geomagnetic field perturbation and its variability (i.e., dB/dt) in the Russian sector at auroral latitudes into space weather studies.
Vorobev Andrey, Pilipenko Vyacheslav, Dobrovolsky Michael, Kozyreva Olga, Evdokimova Marina, Kudin Dmitriy Vladimirovich   +5 more
doaj   +1 more source

Method for estimation of solar, geomagnetic, and atmospheric contributions to 27-day component of peak electron density

Results in Physics, 2019
The study suggests a new method for estimation of the solar, geomagnetic, and atmospheric contributions to 27-day component of peak electron density. For our analysis, we calculated complex amplitudes of 27-day components filtered from the data sets of ...
K.G. Ratovsky, G.A. Zherebtsov, V.P. Tashlykov   +2 more
doaj   +1 more source

Direct Observations of Large‐Scale Wave Structure and Post‐Sunset Rise of the Ionosphere in the Generation of Equatorial Spread F

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Large‐scale wave structure (LSWS) and the post‐sunset rise (PSSR) are two key factors in the generation of equatorial spread F (ESF). In this study, we reported continuous and direct observations of LSWS and PSSR and their effects on seeding ESF by Sanya incoherent scatter radar (SYISR) and ionosonde in September–October 2024.
Qi Jiang, Jiuhou Lei, Xinan Yue, Fuqing Huang, Rong Xia, Tong Dang, Xiaoli Luan   +6 more
wiley   +1 more source

A Novel Neural Network‐Based Approach to Derive a Local Geomagnetic Baseline for Future Robust Characterization of Geomagnetic Indices at Mid‐Latitude

Space Weather
Geomagnetic indices derived from ground magnetic measurements characterize the intensity of solar‐terrestrial interaction. Global magnetic indices derived from multiple magnetic observatories at mid‐latitude have commonly been used for space weather ...
Rungployphan Kieokaew, Veronika Haberle, Aurélie Marchaudon, Pierre‐Louis Blelly, Aude Chambodut   +4 more
doaj   +1 more source

Mid‐Latitude Double H‐Spikes: Their Properties and Signatures in Different Geomagnetic Indices

Space Weather, 2023
Proper assessment of geomagnetic disturbances is a key aspect of space weather as technology is often impacted by space weather activity without previous warnings or proper forecasts.
E. Saiz, A. Guerrero, C. Cid
doaj   +1 more source

Local Evolution of a Prenoon Drainage Plume

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Plasmaspheric drainage plumes are typically observed in the postnoon sector during geomagnetic storms, but their local evolution in the prenoon sector remains poorly understood. Here, we report in situ observations from the Van Allen Probe, revealing multiple localized enhancements in cold electron density near apogee in the prenoon sector ...
Suk‐Bin Kang, Mei‐Ching Fok, Cristian Ferradas, Alex Glocer, Megha Pandya, J. D. Huba   +5 more
wiley   +1 more source

Effect of Ap-Index of Geomagnetic Activity on S&P 500 Stock Market Return

Advances in Astronomy, 2019
Geomagnetic activity with global influence is an essential object of space weather research and is a significant link in the section of the solar wind-magnetospheric coupling process.
Lifang Peng, Ning Li, Jingwen Pan
doaj   +1 more source

Global Wind Field Reconstruction in the Mesosphere and Lower Thermosphere (MLT) During Geomagnetic Storms by Fusing TIDI and SABER Data: A Generative Adversarial Network (GAN) Approach

Geoscience Data Journal, Volume 13, Issue 3, July 2026.
ABSTRACT The Mesosphere and Lower Thermosphere establish an essential connection between Earth's lower atmosphere and upper atmosphere because wind patterns essential for atmospheric movement also influence energy distribution and chemical movements during geomagnetic storms that disrupt satellite operations and space weather prediction systems.
Yunhao Si
wiley   +1 more source

An Information Geometry‐Based Method to Study Atmospheric and Seismic Phenomena With VLF Signals

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract We propose to employ the framework of information geometry to detect anomalies in Very Low Frequency (VLF) and Low Frequency (LF) signal propagation, measured globally across amplitude and phase channels. Using a sliding‐window approach, the probability distributions of signal data are compared over adjacent intervals, defining a statistical ...
Abhiram Anand Thiruthummal, Sergiy Shelyag, Viktor Fedun, Sergey Ruzheinikov, Eun‐jin Kim   +4 more
wiley   +1 more source