Common Characteristics of the Active Regions of Strong Proton Flares

Details Common Characteristics of the Active Regions of Strong Proton Flares Common Characteristics of the Active Regions of Strong Proton Flares

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998soph..181..327z&link_type=abstract

Solar Physics, v. 181, Issue 2, p. 327-336 (1998).

Physics

5

Scientific paper

Common characteristics of nine active regions with strong proton flares in the 22nd solar activity cycle have been presented. Results show that the typical morphology of these active regions is a delta-type sunspot with a single multiple structure, in which there are many umbras with different magnetic polarities, packed tightly by a single penumbra. In these active regions, the rotating directions of the sunspot groups are nearly independent of their position on the solar disk. When the angle of rotation approaches the positive or the negative maximum, proton flares may occur in these active regions. After proton flares, sunspot groups rotate in the inverse direction because of the slack in the flux rope.

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