Magnetic holes in the solar wind

Details Magnetic holes in the solar wind Magnetic holes in the solar wind

May 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976stin...7624136t&link_type=abstract

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Interplanetary Magnetic Fields, Solar Activity, Solar Wind, Current Sheets, Explorer 43 Satellite, Magnetometers

Scientific paper

An analysis is presented of high resolution interplanetary magnetic field measurements from the magnetometer on Explorer 43 which showed that low magnetic field intensities in the solar wind at 1 AU occur as distinct depressions or 'holes'. These magnetic holes are new kinetic-scale phenomena, having a characteristic dimension on the order of 20,000 km. They occurred at a rate of 1.5/day in the 18-day time span (March 18 to April 6, 1971) that was analyzed. Most of the magnetic holes are characterized by both a depression in the absolute value of the magnetic field, and a change in the magnetic field direction; some of these are possibly the result of magnetic merging. However, in other cases the magnetic field direction does not change; such holes are not due to magnetic merging, but might be a diamagnetic effect due to localized plasma inhomogeneities.

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