Interplanetary-magnetosphere coupling during intense geomagnetic storms at solar maximum
- tormentas geomagnéticas,
- reconexión magnética.
- geomagnetic storms,
- magnetic reconnection.
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Copyright (c) 1992
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During the interval of August 16,1978 - December 28, 1979, 90% of the intense geomagnetic storms (Dst < -100nT) were precede by the arrival of interplanetary fast forward shocks at 1AU, as identified with magnetic field and plasma data collected by the ISEE-3 spacecraft. For these events we discuss the interplanetary structures that are associated with the large- amplitude and long-duration negative Bz fields that are thought to be the main cause of the intense storms. We also present a summary of the interplanetary-magnetosphere coupling functions, based on the magnetopause reconnection process. We end by an overview of the long-term evolution of intense geomagnetic storms such as those associated to the seasonal and solar cycle distributions.