Causes of major magnetic storms near the latest solar maximum
Abstract
We have studied the nine most severe magnetic storms (Dst < -200 nT) that occurred during the period from 1999 to the end of the year 2001 i.e. near the last solar activity maximum. The investigated storms showed large variety both in their solar and solar wind causes. Only two of these storms were caused by a sheath region together with a well-defined magnetic cloud event. Distorted magnetic fields preceding the CME ejecta were the storm drivers in five cases.
- Publication:
-
Solar Variability: From Core to Outer Frontiers
- Pub Date:
- December 2002
- Bibcode:
- 2002ESASP.506..137H
- Keywords:
-
- Coronal Mass Ejection (CME);
- Magnetic Storms;
- Sheath Region