Intense magnetic fields at 1 AU: Solar cycle 20

Details Intense magnetic fields at 1 AU: Solar cycle 20 Intense magnetic fields at 1 AU: Solar cycle 20

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978stin...7913969b&link_type=abstract

Unknown

Physics

Magnetic Fields, Shock Waves, Solar Cycles, Elastic Waves, Magnetic Dispersion, Magnetic Flux, Secular Variations

Scientific paper

Of the intense magnetic fields (greater than 13 gamma) observed at 1 AU during solar cycle 20 (1973-1975), 92% were associated with shocks, stream interfaces, or cold magnetic enhancements (CMEs). Most (52%) of the magnetic field intensity enhancements occurred at stream interfaces; 27% occurred behind shocks without interfaces; and 11% occurred in CMEs. The most intense fields (25 gamma to 37 gamma) followed shocks. Magnetic field intensities at interfaces did not exceed 25 gamma, suggesting a mechanism such as a magnetoacoustic wave limits the intensity ahead of streams. Intense magnetic fields persist longest behind shocks.

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