A study of geosynchronous magnetopause crossings

Details A study of geosynchronous magnetopause crossings A study of geosynchronous magnetopause crossings

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9415125r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Nov. 1, 1989, p. 15125-15134. Research supported by NOAA and Illinois

Physics

53

Geosynchronous Orbits, Magnetopause, Solar Terrestrial Interactions, Solar Wind, Goes Satellites, Histograms, Magnetic Storms, Tables (Data), Temporal Distribution

Scientific paper

Sixty-four magnetopause crossings at geosynchronous orbit were detected by the GOES 2, 5, and 6 satellites between 1978 and 1986. The total accumulated crossing duration was 4 hours/year. These rare events permit investigation of the interaction of the solar wind with the magnetosphere. This interaction has been examined through comparisons of solar wind and geophysical parameters during crossing episodes, and through superposed epoch event analysis of these periods. The study suggests that both high solar wind dynamic pressures and southward interplanetary B(z) are required for the excursion of the magnetopause to geostationary orbit and beyond. An approximate relationship between the strength of the southward B(z) and the subsolar distance to the magnetospheric boundary has been obtained.

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