Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ihy..worke..48l&link_type=abstract
2nd UN/NASA Workshop on International Heliophysical Year and Basic Space Science. Proceedings of the conference held 27 Novembe
Astronomy and Astrophysics
Astrophysics
Scientific paper
lakhina@iigs.iigm.res.in The solar energetic particle (SEP) events are the energetic outbursts as a result of acceleration and heating of solar plasma during solar flares and coronal mass ejections (CMEs). The SEP events are characterized by abrupt enhancements in the proton flux in the energy range of keVs to MeVs as measured by spacecraft at 1 AU. On impacting the earth's magnetosphere, the SEP events can lead to a sudden disturbance of the earth's magnetic field, known as Geomagnetic storms. In the present study, the effects of some strong SEP events of the present solar cycle on various magnetic storm processes are investigated by using the Solar flare and CME data from GOES-8 and SOHO, interplanetary plasma and magnetic field data from ACE and Wind, and the ground magnetic field data from Alibag and Tirunelveli magnetic observatories. The main focus will be to highlight the low latitude geomagnetic signatures produced by these SEP events. The SEP events with the persistence of high level of proton flux after the shock are found to be associated with intense magnetic storms. The role of SEP events in the prediction of intense geomagnetic storms will be discussed.
Alex Shobana
Lakhina Gurbax S.
Rawat Rahul
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