Speaker
Mr
RAJIV KUMAR
(GOVERNMENT PENCH VALLEY POST GRADUATE COLLEGE PARASIA)
Description
A detailed investigation on geoeffectiveness of Coronal Mass Ejections [CMEs] associated with Magnetic Clouds [ MCs ] observed during 1996-2009 have been studied. The collected sample events are divided into two groups based on their association with CMEs related to geomagnetic storms, Dst ≤ -50 nT eg. 1. geoeffective events & 2. For nongeoeffective events, Dst ≥ -50 nT. Other field parameters and their various derivatives & variance [BZV, BZV2, (BZ)2V] have been analysed in an attempt to study mechanism and the cause of geoeffectiveness. Furthermore, Halo and partial halo CMEs are likely to be the major cause for Geomagnetic storms [GMSs ] of high intensity. From our investigations, we have observed that the intense and long duration, southward magnetic field component [ BZ ] and fast solar wind speed are responsible for geomagnetic storms. There exists a weak anti-correlationship ( R = - 0.36 ) for geoeffective events between CME speed [ VCME ] and Dst index and relatively better correlation 1. between VCME and solar wind speed [ VSW ] ( R= 0.54 ) and 2. Dst index and solar wind speed ( R=0.64 ) whereas the correlation ( R=0.16 ) between Dst index and southward magnetic field component [ BZ ] is very poor .
| Registration number following "ICRC2015-I/" | 605 |
|---|
Author
Mr
RAJIV KUMAR
(GOVERNMENT PENCH VALLEY POST GRADUATE COLLEGE PARASIA)
Co-authors
Prof.
ROHIT VERMA
(S.G.T.B. KHALSA COLLEGE JABALPUR)
Prof.
SANTOSH KUMAR
(PROFESSOR(Rtd.) DEPARTMENT OF PHYSICS, R.D. UNIVERSITY JABALPUR)
