Magnetic field structure of interplanetary magnetic clouds at 1 AU

Details Magnetic field structure of interplanetary magnetic clouds at 1 AU Magnetic field structure of interplanetary magnetic clouds at 1 AU

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9511957l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Aug. 1, 1990, p. 11957-11965.

Physics

337

Interplanetary Magnetic Fields, Interplanetary Medium, Magnetic Clouds, Magnetic Field Configurations, Plasma Temperature, Solar Wind, Bessel Functions, Computerized Simulation, Imp, International Sun Earth Explorers, Magnetic Flux, Solar Eclipses

Scientific paper

Interplanetary magnetic clouds emerge as a feature of the solar wind at 1 AU, exhibiting enhanced field strength and lower plasma temperature and density than the surrounding plasma. A least-squares program has been developed which fits magnetic field data within a cloud, while estimating such cloud properties as its size, maximum field strength, and axis inclination. The results obtained from a study of 12 clouds observed at 1 AU point to a probable cloud axis direction within 15 deg of the ecliptic plane and about 100 deg from the sun's direction, when projected into the ecliptic plane. A wide variety of orientations is observed; some extend to 80 deg from the ecliptic.

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