Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3665k&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
1
Scientific paper
An attempt has been made to locate the solar features and their effectiveness causing the storm sudden commencements (SSCs) type geomagnetic storms (GMSs) with Dst < -100 nT on Earth. Twenty four GMSs have been investigated using solar wind Plasma (SWP) data, interplanetary magnetic field (IMF) data and solar geophysical data (SGD) during the period 1986-93. It is observed statistically that X-ray, Hα solar flares and active prominences and disapp earing filaments (APDFs) which have occurred within lower heliographic latitudinal zones are associated with larger number of GMSs at Earth. Furthermore, the maximum number of GMSs are associated with solar flares of lower importance (SF). The lower importance in association with some specific characteristics such as, location, region, duration of occurrence of event may also cause such type of GMSs. It is found that CMEs, causing GMSs which occur at low heliolatitude are related with eruptive prominences, X-ray events, optical and Hα solar flares and type I Ind and IV radio bursts.
Kumar Santosh
Pratap Yadav Mahendra
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