Physics
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995soph..157..213h&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 157, no. 1-2, p. 213-222
Physics
3
Solar Flares, Solar Longitude, Solar Magnetic Field, Solar Physics, Sun, Filtergrams, Magnetic Flux, Magnetic Signatures, Variability
Scientific paper
Longitudinal components of highly stressed magnetic fields in the active region NOAA 7640 on 26 December, 1993 have been studied. A physical parameter is suggested for describing the longitudinal components recorded in longitudinal magnetograns obtained before and after a 1 N/M 1.5 flare. By means of this parameter, quantitative comparisons among the pre-flare magnetograms, the post-flare magnetograms, and filtergrams (in H beta) have been executed. The main results are as follows: firstly, the areas with high values of the parameter are near the regions with newly emerging magnetic flux. Secondly, the maximum values of the parameter in the areas and the sizes of the areas are evidently decreased after the flare. Finally, the original bright point of the flare is near the areas and the flare kernals cover the areas when the flare is growing. According to these results, we conclude that the variation of the parameter is connected with that of highly stressed magnetic fields in the region and directly related to the flare.
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