Explorer 45 /S3-A/ observations of the magnetosphere and magnetopause during the August 4-6, 1972, magnetic storm period

Details Explorer 45 /S3-A/ observations of the magnetosphere and magnetopause during the August 4-6, 1972, magnetic storm period Explorer 45 /S3-A/ observations of the magnetosphere and magnetopause during the August 4-6, 1972, magnetic storm period

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.4287h&link_type=abstract

Journal of Geophysical Research, vol. 80, Nov. 1, 1975, p. 4287-4296.

Physics

6

Magnetic Storms, Magnetopause, Magnetospheric Instability, Satellite Observation, Explorer Satellites, Magnetic Field Inversions, Magnetic Measurement, Ring Currents, Solar Wind, Sudden Storm Commencements

Scientific paper

The Explorer 45 (S3-A) satellite performed extensive field and particle measurements in the heart of the magnetosphere during the double magnetic storm period of August 4-6, 1972. Both the ground level magnetic records and the magnetic field deformations measured along the orbit by the satellite indicated the existence of only a moderate ring current. This was confirmed by the measurements of the total proton energy density by the on-board particle detectors, which showed a maximum energy density less than the densities observed during the December 1971 and June 1972 magnetic storms. The plasmapause in the noon quadrant was eroded continuously from the onset of the first storm at the beginning of August 4 to an altitude below L = 2.07 at about 1800 hours on August 5. Throughout the entire orbit during which the second sudden commencement occurred, a large amount of low-frequency electric and magnetic field noise was encountered. The most remarkable observation during this orbit was the contraction of the magnetopause to distances inside the satellite location at L = 5.2.

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