Results 111 to 120 of about 4,523 (241)

COVEN: Providing a Variety of Threshold‐Based Forecasts for the Outer Radiation Belt

Space Weather, Volume 24, Issue 6, June 2026.
Abstract We present a suite of VAMPIRE (Van Allen belt Multi‐day Predictions by Implementing a Random Forest for Electrons) models capable of predicting if the outer radiation belt crosses set percentile thresholds. We use Random Forest classification models to predict if the daily ∼2 MeV electron flux level across the outer radiation belt exceeds ...
D. J. Weston, I. J. Rae, A. W. Smith, C. E. J. Watt   +3 more
wiley   +1 more source

Characteristics of night-time absorption spike events [PDF]

, 2006
International audienceSudden increases in cosmic radio noise absorption, known as spike events, have been identified as signatures of substorms in the previous studies.
Viljanen, A., E. Spanswick, Kavanagh, A. J., A. Aminaei, A. J. Kavanagh, Spanswick, E., F. Honary, A. Viljanen, Honary, F., Aminaei, A.   +9 more
core   +1 more source

Estimation of the contributions of conductance and electric field to the intensity of field-aligned currents in the night polar ionosphere during substorm expansion phase

Геодинамика и тектонофизика, 2019
Based on the output data of the magnetogram inversion technique, we analyze the dynamics of the Pedersen ionospheric currents and field-aligned currents (FACs) in the night mesoscale cells of the three main large-scale Iijima and Potemra Regions (R1, R2 ...
V. V. Mishin, S. B. Lunyushkin, V. M. Mishin, M. A. Kurikalova, Yu. V. Penskikh   +4 more
doaj   +1 more source

Regional and Seasonal Effects of Geomagnetic Storms on Terrestrial Weather

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract It has long been a mystery why small Total Solar Irradiation changes have significant effects on Earth's climate. Solar cycle correlation studies abound but cannot conclusively point to a viable physical mechanism. Here, I show that geomagnetic storms have a profound terrestrial weather impact.
J. Raeder
wiley   +1 more source

Interhemispheric asymmetries in the occurrence of magnetically conjugate sub-auroral polarisation streams [PDF]

, 2005
Earthward injections of energetic ions and electrons mark the onset of magnetospheric substorms. In the inner magnetosphere (L∼4), the energetic ions drift westward and the electrons eastward, thereby enhancing the equatorial ring current.
Parkinson, M.L., Frey, H.U., H. U. Frey, Ye, H., Parkinson, M. L., Kikuchi, T., Dyson, P. L., M. L. Parkinson, Milan, S.E., T. K. Yeoman, M. Pinnock, Yeoman, T. K., Wild, J.A., J. C. Devlin, Devlin, J. C., Milan, S. E., Lester, M., Wild, J. A., H. Ye, J. A. Wild, M. Lester, Pinnock, M., T. Kikuchi, S. E. Milan, Devlin, J.C., Frey, H. U., Yeoman, T.K.   +26 more
core   +1 more source

A Tailored Deep Learning Network with Embedded Space Physical Knowledge for Auroral Substorm Recognition: Validation Through Special Case Studies

Universe
The dynamic morphological characteristics of the auroral oval serve as critical diagnostic indicators for auroral substorm recognition, with each pixel in ultraviolet imager (UVI) data carrying different physical implications.
Yiyuan Han, Bing Han, Zejun Hu
doaj   +1 more source

Distribution of Region 1 and 2 currents in the quiet and substorm time plasma sheet from THEMIS observations

Geophysical Research Letters, 2016
Although Earth's Region 1 and 2 currents are related to activities such as substorm initiation, their magnetospheric origin remains unclear. Utilizing the triangular configuration of THEMIS probes at 8–12 RE downtail, we seek the origin of nightside ...
Jiang Liu, V. Angelopoulos, Xiangning Chu, R. L. McPherron   +3 more
doaj   +1 more source

LEO‐DOS Absorbed Dose Observations During the May 2024 Geomagnetic Superstorm

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The Low‐Earth Orbit Space Radiation Dosimeter (LEO‐DOS) onboard Next‐Generation Satellite II (NEXTSat‐2) measured absorbed dose rate variations during the May 2024 geomagnetic superstorm. The observations show deep storm‐time penetration of solar energetic particle (SEP) spanning L ≈ 2–10, a pronounced enhancement near L ≈ 3 consistent with ...
Jongil Jung, Young‐Sil Kwak, Uk‐Won Nam, Suyeon Oh, Won‐Kee Park, Sukwon Youn, Jaeyoung Kwak, Jongdae Sohn, Bongkon Moon, Jaejin Lee, Sunghwan Kim, Sung‐Joon Ye   +11 more
wiley   +1 more source

Observed tail current systems associated with bursty bulk flows and auroral streamers during a period of multiple substorms [PDF]

, 2008
We present a multi-instrument study of a substorm bursty bulk flow (BBF) and auroral streamer. During a substorm on 25 August 2003, which was one of a series of substorms that occurred between 00:00 and 05:00 UT, the Cluster spacecraft encountered a BBF ...
A. Kadokura (7591268), R. C. Fear (7591262), S. W. H. Cowley (7590302), Colin Forsyth (7434155), Frey, HU, Reme, H, Lucek, E, I. Dandouras (7591256), Fazakerley, A. N., J. Watermann, Grocott, A, Milan, SE, R. C. Fear, Rème, H., I. Dandouras, Milan, S. E., Lester, M., C. Forsyth, J. F. Watermann (7591277), Grocott, A., M. Lester, A. N. Fazakerley, M. Lester (7589660), A. Kadokura, S. E. Milan, Cowley, S. W. H., A. N. Fazakerley (7591259), E. Lucek, Dandouras, I, Frey, H. U., Watermann, J., Fear, RC, Kadokura, A., S. W. H. Cowley, H. U. Frey, H. Rème, Watermann, J, H. U. Frey (7591265), Adrian Grocott (7590026), Forsyth, C., Lester, M, A. Grocott, Dandouras, I., Fazakerley, AN, E. Lucek (7591271), Lucek, E., H. Rème (7591274), Forsyth, C, Steve E. Milan (7589666), Kadokura, A, Cowley, SWH, Fear, R. C.   +51 more
core   +1 more source

Low Frequency Oscillation Observed in the Ionosphere Around the Substorm Onsets

Geophysical Research Letters
Three substorm events in which Defense Meteorological Satellite Program (DMSP) spacecraft are geomagnetically co‐located with substorm onset locations in IMAGE far ultraviolet auroral images are analyzed.
Simon Wing, Jay R. Johnson, Elmer C. Rivera, Arthur J. Hull, Peter Damiano   +4 more
doaj   +1 more source