Physics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...70..351m&link_type=abstract
Solar Physics, vol. 70, Apr. 1981, p. 351-362. Research sponsored by the Aerospace Corporate Programs for Research and Investiga
Physics
7
Flux Quantization, Magnetic Flux, Solar Flares, Solar Magnetic Field, Spectroheliographs, Faculae, Magnetic Signatures, Sunspots, Time Response
Scientific paper
The active region associated with Mt. Wilson sunspot group 18 935 (McMath, 11 976) which had a central meridian passage on August 4 and 5, 1972 produced a number of flares during transit. These included two importance 3B flares on August 4 and 7 as well as several of importance 1 and 2. Calculations of the total magnetic flux in this region were made during the period July 31 through August 9 using data from six observatories. For the 3B flare on August 4, the total flux changed from about 7.2 × 1022 Mx just before onset to about 5.6 × 1022 Mx two hours after onset. For the 3B flare on August 7, the flux was about 6.4 × 1022 Mx three hours before onset and about 5.2 × 1022 Mx three hours after onset. An importance 2B flare on August 2 had no measurable effect on the flux nor did any of several 1N or 1B flares which also occurred in this region during the period. The flux changes measured for the 3B flares occurred in the umbra! and penumbral fields and no significant changes were observed in facular fields.
Chapman Gary A.
Mayfield Earle B.
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