Results 71 to 80 of about 619,372 (203)

Quasi 6‐Day Wave Variability in the Thermosphere and Ionosphere: Observations and Modeling

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract Satellite observations of the upper mesosphere and lower thermosphere from TIMED‐SABER and ICON‐MIGHTI reveal a clear Quasi 6‐Day Wave (Q6DW) event in the winds and temperatures in this region. This Q6DW event persists across multiple data sets throughout the middle‐to‐upper thermosphere and the F‐region ionosphere, including GOLD disk ...
Oluwafisayo P. Owolabi, Scott L. England, Yen‐Jung Wu   +2 more
wiley   +1 more source

Mid-latitude ionosphere during two great geomagnetic storms

, 1996
The ionospheric disturbances observed at many European ionosonde stations in association with the severe geomagnetic storms occurring on 19-20 December 1980 and 11-12 April 1981 were investigated by using the available ionospheric and geomagnetic data ...
Cander, L. R., Vasiljevic, I. M.
core   +1 more source

Evaluation of Spaceborne GPS Data Quality and Higher-order Ionospheric Delay Effects on SWARM Precise Orbit Determination in the Severe Geomagnetic Storm on April 23–24, 2023

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Geomagnetic storms significantly enhance ionospheric electron density, thereby severely influencing ionospheric delay and degrading the quality of spaceborne GPS observations for low Earth orbit satellites.
Qiaoli Kong, Leru Gao, Shi Wang, Qian Li, Guoli Bo, Lulu Zhang   +5 more
doaj   +1 more source

Statistical Scale Analyses of a Diurnal Periodicity in Auroral Kilometric Radiation, Observed by Wind/WAVES

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract The Earth's strongest natural radio emission is Auroral Kilometric Radiation (AKR), which is correlated with auroral intensity, and is a barometer for space weather. AKR is generated by the electron cyclotron maser instability, with sources on auroral field lines. Previous work on AKR and radio emissions from other planets (or stars) points to
Alexandra Ruth Fogg, S. Wu, C. M. Jackman, S. J. Walker, M. J. Rutala, C. K. Louis, S. M. Ivanov, L. Lamy, J. E. Waters, D. K. Whiter   +9 more
wiley   +1 more source

rms-based planetary geomagnetic activity indices

, 2009
International audiencePlanetary geomagnetic indices aa, am, and Kp are based upon K indices measured at geomagnetic observatories. K indices are directly related to the range during 3-hour intervals of the irregular variations in the horizontal ...
Menvielle, M.
core   +1 more source

Can Solar Cyclic Variability Mimic Extreme Solar Particle (Miyake) Events in Radiocarbon?

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Rapid, strong enhancements in Δ14 ${{\Delta }}^{14}$C in the Earth's atmosphere, known as Miyake events, rarely occurred over the past millennia, pointing to major radiation storms affecting Earth. They are produced by extreme solar particle events (ESPEs) and are separated by an order‐of‐magnitude gap in the strength from directly observed ...
Ilya Usoskin, Fusa Miyake, Kseniia Golubenko   +2 more
wiley   +1 more source

A Novel Model for Forecasting Geomagnetic Indices Using Machine Learning

Geophysical Research Letters
Widely used geomagnetic activity indices like Kp or Dst, derived from the combined data from several observatories distributed worldwide, are crucial to forecasting since solar‐driven geomagnetic activity can significantly affect technology and human ...
Guram Kervalishvili, Ingo Michaelis, Monika Korte, Jan Rauberg, Jürgen Matzka   +4 more
doaj   +1 more source

Ground based observations of Pc3-Pc5 geomagnetic pulsation power at Antarctic McMurdo station

Annals of Geophysics, 1998
The two horizontal geomagnetic components and, measured by a fluxgate magnetometer at Antarctic McMurdo station (corrected geomagnetic coordinates 80.0° S, 327.5° E), are analyzed for the period May-June 1994; the spectral powers are calculated and ...
C. G. Maclennan, M. J. Engebretson, P. Ballatore, M. Candidi   +3 more
doaj   +1 more source

Impacts of Neutral Wind‐Driven Currents on Geomagnetic Disturbances and Magnetospheric Dynamics During the May 2024 Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract The neutral wind dynamo generates ionospheric currents that can significantly affect high‐latitude electrodynamics during geomagnetic storms, yet its role in global magnetosphere‐ionosphere coupling is often underrepresented. We quantify the impact of wind‐driven currents on geomagnetic disturbances (GMDs) and magnetospheric dynamics during ...
Yu Hong, Yue Deng, Cheng Sheng, Daniel Welling, Colin Waters   +4 more
wiley   +1 more source

Forecasting of the Geomagnetic Activity for the Next 3 Days Utilizing Neural Networks Based on Parameters Related to Large‐Scale Structures of the Solar Corona

Space Weather
With the increasing number of large constellations, it is crucial to accurately predict satellite positions and movements using upper atmosphere models driven by geomagnetic indices. Machine learning (ML) can quickly provide geomagnetic index predictions.
Tingyu Wang, Bingxian Luo, Jingjing Wang, Xianzhi Ao, Liqin Shi, Qiuzhen Zhong, Siqing Liu   +6 more
doaj   +1 more source