Origin of interplanetary southward magnetic fields responsible for major magnetic storms near solar maximum (1978-1979)

Details Origin of interplanetary southward magnetic fields responsible for major magnetic storms near solar maximum (1978-1979) Origin of interplanetary southward magnetic fields responsible for major magnetic storms near solar maximum (1978-1979)

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.8519t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Aug. 1, 1988, p. 8519-8531.

Physics

225

Interplanetary Magnetic Fields, Magnetic Clouds, Magnetic Storms, Solar Activity, Solar Magnetic Field, International Sun Earth Explorers, Solar Observatories

Scientific paper

Simultaneous ISEE-3 field and plasma data were used to examine interplanetary phenomena associated with 10 major magnetic storms detected from August 16, 1978, to December 28, 1979, in a study of Gonzalez and Tsurutani (1987), and, in particular to determine the origins of the southward magnetic fields which caused the storms. In nine of the 10 cases, the responsible interplanetary events were found, as expected, to be associated with the high magnetic fields in the stream-stream interaction regions (sheaths) or driver gases, with the events following the interplanetary shocks. The tenth event was found to be associated not with a high-speed stream, but with a noncompressional density-enhancement event. The results of this study indicate the equal importance of both the sheath fields or draped fields and the driver gas fields for the generation of major geomagnetic storms.

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