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dc.contributor.authorGopalswamy, N-
dc.contributor.authorXie, H-
dc.contributor.authorYashiro, S-
dc.contributor.authorUsoskin, I-
dc.identifier.issn0975-105X (Online); 0367-8393 (Print)-
dc.description.abstractGround level enhancement (GLE) events, typically in the GeV energy range, are the most energetic of solar energetic particle (SEP) events with the protons penetrating Earth’s neutral atmosphere. During solar cycle 23, sixteen GLE events were observed with excellent data coverage of associated solar eruptions. The source of these GLE particles has been examined in this paper using white light observations of coronal mass ejections, type II radio bursts, and soft X-ray flares. It has been shown that the GLE events are consistent with shock acceleration in every single case. While the possibility of the presence of a flare component during GLE events cannot be ruled out, it can be definitely said that a shock component is present in all the GLE events. During 18 April 2001 GLE event, the source was located ~30 degrees behind the west limb, which is too far away from the magnetic field lines connecting Earth and hence the flare component can be ruled out. Also the presence of interplanetary shocks associated with the GLEs is shown using radio and in-situ observations.en_US
dc.publisherNISCAIR-CSIR, Indiaen_US; 96.60.qe; 96.60.Vg; 96.50.Fmen_US
dc.rights CC Attribution-Noncommercial-No Derivative Works 2.5 Indiaen_US
dc.sourceIJRSP Vol.39(5) [October 2010]en_US
dc.subjectGround level enhancement (GLE) eventen_US
dc.subjectCoronal mass ejection (CME)en_US
dc.subjectSolar flareen_US
dc.subjectSolar energetic particle (SEP) eventen_US
dc.subjectRadio bursten_US
dc.titleGround level enhancement events of Solar cycle 23en_US
Appears in Collections:IJRSP Vol.39(5) [October 2010]

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