Results 81 to 90 of about 13,823 (196)

Frequency‐Dependent Latitudinal Distributions of Plasmaspheric Plume Hiss Directionality and Amplitude

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Plasmaspheric plume hiss plays a crucial role in shaping Earth's electron radiation belts and influencing magnetosphere–ionosphere energy coupling. However, its generation mechanism remains contested between cyclic‐linear and localized‐nonlinear models. By analyzing over 64,000 high‐resolution plume hiss wave segments from the Van Allen Probes
Zhiyong Wu, Zhenpeng Su, Huinan Zheng, Yuming Wang   +3 more
wiley   +1 more source

155-day Periodicity in Solar Cycles 3 and 4

, 2009
The near 155 days solar periodicity, so called Rieger periodicity, was first detected in solar flares data and later confirmed with other important solar indices.
Bai, Ballester, Ballester, Basu, Cane, Carbonell, Chowdhury, Dennis, Dimitropoulou, Frick, Gonzalez, Gonzalez, Harrison, Howe, Howe, Hoyt, Ichimoto, J.M. Vaquero, Knaack, Krivova, Krivova, Lean, Lean, M. Vázquez, M.C. Gallego, R.M. Trigo, Rieger, Silverman, Silverman, Sturrock, Temmer, Torrence, Usoskin, Usoskin, Usoskin, Usoskin, Vaquero, Vaquero, Vaquero, Vaquero, Vaquero, Zolotova   +41 more
core   +1 more source

Can the International Reference Ionosphere Model Predict Long‐Term Trends in the Ionosphere?

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract The International Reference Ionosphere (IRI) model can partially reproduce ionospheric long‐term trends (LTTs), although not intentionally, provided that an appropriate effective ionospheric index is used. We evaluate how model predictions driven by a solar activity proxy (R12) and by an effective ionospheric proxy (IG12) can reproduce the ...
A. Pignalberi, M. Pietrella, T. Alberti, M. Pezzopane   +3 more
wiley   +1 more source

Do Eclipse‐Induced Thermospheric TADs Originate From Above or Below?

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Solar eclipses generate significant wave activity in the Earth's upper atmosphere. The source region of eclipse‐induced Traveling Atmospheric Disturbances (TADs) in the upper thermosphere—particularly the relative contributions of gravity waves from the thermosphere itself versus the lower atmosphere—remains unknown. Using the Whole Atmosphere
Yu Jiao, Jing Liu, Shuhan Li, Joseph M. McInerney, Jianyong Li, Yuyan Yang   +5 more
wiley   +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

Playing the field: Geomagnetic storms and international stock markets [PDF]

This paper documents the impact of geomagnetic storms (GMS) on world and country-specific stock market returns. For the world index and for most of the international indices in our sample, we find that the previous week's unusually high levels of ...
Anna Krivelyova, Cesare Robotti
core  

ENSO‐Mediated Linkage Between the East Asian Summer Monsoon and Cordilleran Ice Sheet Discharge During MIS 3

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Understanding the mechanisms linking low‐latitude monsoon variability and high‐latitude ice‐sheet discharge is critical for elucidating past atmospheric teleconnections, yet direct evidence for such linkages during the last glacial period remains limited. Here we present a high‐resolution terrigenous input record from the South China Sea (SCS)
Haosen Wang, Yi Zhong, Yuanjie Li, Hai Li, Xing Xu, Xiaoxu Shi, Qingsong Liu   +6 more
wiley   +1 more source

Estimating the extremes in European geomagnetic activity [PDF]

, 2009
Rapidly changing geomagnetic field variations constitute a natural hazard, for example in navigation and, through geomagnetically induced currents, to power grids and pipeline networks.
Dawson, Ewan, Reay, Sarah, Thomson, Alan
core  

Wave‐Based Quantification of Ion Composition in the Earth's Magnetosphere‐Ionosphere‐Coupling Region

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Ion composition critically determines the basic kinetic characteristics of plasma and affects energy transmission of the magnetosphere. However, it exhibits significant variations with altitude, latitude, local time, longitude, and also with geomagnetic and solar activity.
Zhijie Qin, Hui Zhu, Zhihai Ouyang, Huicong Chen, Zhenghao She   +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