Radial deformation of the solar current sheet as a cause of geomagnetic storms

Details Radial deformation of the solar current sheet as a cause of geomagnetic storms Radial deformation of the solar current sheet as a cause of geomagnetic storms

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27.1055a&link_type=abstract

Planetary and Space Science, vol. 27, Aug. 1979, p. 1055-1062.

Physics

4

Current Sheets, Geomagnetism, Magnetic Storms, Solar Wind, Earth Magnetosphere, Interplanetary Magnetic Fields, Radial Distribution

Scientific paper

It is suggested that the solar current sheet, extending from a coronal streamer, develops a large-scale radial deformation, at times with a very steep gradient at the earth's distance. The associated magnetic field lines (namely, the interplanetary magnetic field (IMF) lines) are expected to have also a large gradient in the vicinity of the current sheet. It is also suggested that some of the major geomagnetic storms occur when the earth is located in the region where IMF field lines have a large dip angle with respect to the ecliptic plane for an extended period (6-48 h), as a result of a steep radial deformation of the current sheet.

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