EFFECT OF CORONAL MASS EJECTION ON THE EARTH'S MAGNETIC FIELD DURING THE ASCENDING AND DESCENDING PHASE OF SOLAR CYCLES-24

Purushottam Kumar, Achyut Pandeya

Abstract


In this paper we analyzed the coronal mass ejection (CMEs) in angular widths wise and linear speed wise and geomagnetic disturbance storm time
(Dst) index during ascending and descending phase of solar cycles-24. Total CME's divided by two phase – angular widths wise and linear speed
wise for the ascending period 2007-2012 and descending period 2013-2017. We have found that the widths of 79% CME's are narrow and 2% are
Halo for the ascending phase of solar cycles-24, and 71% CME's are narrow and 2% are Halo for the descending phase of solar cycles-24. The linear
speed distribution of 87% CME's has speed <=500 km/sec and 1%CME's have speed >1000 km/sec for ascending phase of solar cycles-24, and
85% CMEs has speed <=500 km/sec and 1% CMEs has speed >1000 km/sec for descending phase of solar cycles-24. We also describe the
coefficient of correlation between disturbance storm time (Dst) and coronal mass ejection (CMEs) for ascending and descending phase of solar
cycles-24, and we conclude that the ascending phase of solar cycles-24 is strong as compare to descending phase of solar cycles-24


Keywords


Coronal mass ejection (CMEs), disturbance storm time (Dst), Halo CMEs, Fast CMEs

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