The interaction of impulsive solar wind discontinuities with the magnetosphere - A multi-satellite case study

Details The interaction of impulsive solar wind discontinuities with the magnetosphere - A multi-satellite case study The interaction of impulsive solar wind discontinuities with the magnetosphere - A multi-satellite case study

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38..841l&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 38, July 1990, p. 841-850.

Computer Science

1

Earth Magnetosphere, Magnetic Storms, Solar Terrestrial Interactions, Solar Wind, Ampte (Satellites), Bow Waves, Interplanetary Magnetic Fields, Magnetic Signatures, Shock Waves

Scientific paper

Data collected on September 4-5, 1984 by the outbound AMPTE/IRM spacecraft which stayed just outside the expanding earth's bow shock for 7.5h are examined. The data are gathered during an unusual period for which the solar wind pressure and magnetic field are relatively constant except for two discontinuities with associated approximately equal to 1 min duration pressure pulses. The observations indicate that the bow shock reacts rapidly to solar wind dynamic pressure variations; that both discontinuity/pressure pulse events were followed more or less immediately by a decrease in the geosynchronous particle fluxes, indicating the growth phase of a substorm and possibly also the shadowing of energetic ions by the compressed magnetopause followed after 10-30 min by a sudden enhancement in the energetic particles which began on the nightside and drifted to the dayside; and sudden impulse ground signatures are observed which seem to depend critically on the IMF orientation as well as on the longitude and latitude of the particular ground stations.

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