Evolution of an Active Region and Flare Productivity

Details Evolution of an Active Region and Flare Productivity Evolution of an Active Region and Flare Productivity

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994kofu.symp..353k&link_type=abstract

In: Proceedings of Kofu Symposium, Kofu, Japan, Sept. 6-10, 1993, p.353-356.

Physics

Scientific paper

We have studied the evolution of an active region (AR 7515) in terms of flare productivity. This region appears at the east limb on May 23, 1993 and then continues its onward march across the disk. We follow its evolution until June 2. This region produces many small flares. We study the topology, both magnetic and structural of the neighboring regions as observed at 17 GHz by the Nobeyama Radio Heliograph (NRH) and the Yohkoh/SXT to find their effects on the flare-producing AR. We investigate the spatial structure of the flaring region from 17 GHz and SXT maps during various times of the impulsive and decay phase, to understand the difference in the flaring region spatial structure during the preflare, impulsive and decay phases. In general, the maps made during these phases show several loops. We try to relate these flaring loops with the preflare active region structure.

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