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Title: Characteristic features of ICMEs associated with big storms in geomagnetic activity and large Forbush decreases in cosmic ray intensity
Authors: Gupta, V
Singh, Y P
Keywords: Coronal mass ejection
Geomagnetic storm
Cosmic ray
Forbush decrease
Interplanetary magnetic field
Issue Date: Oct-2010
Publisher: NISCAIR-CSIR, India
PACS No.:; 96.50.Bh; 92.60.Qx
Abstract: The solar sources and features of interplanetary structures associated with big geomagnetic storm (GS) and/or large Forbush decrease (FD) events have been investigated. The hourly data of geomagnetic activity, cosmic ray (CR) intensity, and solar wind plasma/field has been utilized during the passage of ICMEs and associated structures (e.g. shock/seath, interaction region/high speed stream). The geo-effectiveness and CR-effectiveness of ICMEs, similarities and distinctions between them together with variations/fluctuations in interplanetary plasma/field parameters is utilized in order to identify distinct feature(s) of ICMEs and physical mechanism(s) playing important role in the development of GS and FD.
Page(s): 265-269
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-105X (Online); 0367-8393 (Print)
Source:IJRSP Vol.39(5) [October 2010]

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