Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pbeio..37...33l&link_type=abstract
Astrophysics Reports. Publications of the Beijing Astronomical Observatory, No. 37, p. 33 - 41 (2001). In: Proceedings of the Ei
Astronomy and Astrophysics
Astrophysics
Solar Activity, Magnetic Fields, Flares
Scientific paper
On July 14, 2000 the active region NOAA 9077, had produced one of the largest solar flares (3B/X5.7) seen in recent years associated with a violent halo CME. The salient character of this active region was that it had a βγδ magnetic classification, the morphology of the sunspot group and magnetic field changed obviously each day during its on the solar disk. We present here the relationship between the motion of the spots and the major flare on July 14, based on precise measurements of the spot motions. We find: (1) Special magnetic morphology and quick, successive fragmentation caused the active region in a high shear configuration before the major flare event of July 14; (2) The motion characteristics of group one in the region shows a good correlation between spots motion and largest flares, the initiation of the two-ribbon flare was triggered by the fast emergence of flux system of group one on July 14, which judged from the well spatial correspondence between the direction of the rapid movement of group 1 and the place where the filament was activated.
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