Vol. 31 No. 1 (1992)
Articles

Interplanetary-magnetosphere coupling during intense geomagnetic storms at solar maximum

Published 1992-01-01

Keywords

  • tormentas geomagnéticas,
  • reconexión magnética.
  • geomagnetic storms,
  • magnetic reconnection.

How to Cite

González, W. D., Calu de González, A. L., & Tsurutani, B. T. (1992). Interplanetary-magnetosphere coupling during intense geomagnetic storms at solar maximum. Geofísica Internacional, 31(1), 11-18. https://doi.org/10.22201/igeof.00167169p.1992.31.1.1299

Abstract

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.