Solar and interplanetary causes of large geomagnetic storms.

Details Solar and interplanetary causes of large geomagnetic storms. Solar and interplanetary causes of large geomagnetic storms.

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997injpb..71..515d&link_type=abstract

Indian J. Phys., Part B, Vol. 71B, No. 4, p. 515 - 519

Physics

Geomagnetic Field: Storms, Geomagnetic Field: Solar Wind, Geomagnetic Field: Interplanetary Magnetic Field

Scientific paper

Geomagnetic storms and their association with various solar and interplanetary causes have been reported by various authors for the last solar cycle. At the present time, an important paradigm shift such that coronal mass ejections (CMEs) and not flares are considered to be the causal link with solar activity and produce large geomagnetic storms. Coronal holes are also responsible for recurrent geomagnetic storms. The geomagnetic storms are highly correlated with solar wind velocity and the strength of the southward component of the interplanetary magnetic field (Bs). In the present study, the authors have examined all those large geomagnetic storms which are associated with a Storm Time Index (Dst) decrease of more than 100 nT and their association with different types of solar and interplanetary causes during the period 1986 - 1995.

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