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Motion of sunspot magnetic fields and its relation to solar flares

✍ Scribed by Kunitomo Sakurai

Publisher
Springer
Year
1976
Tongue
English
Weight
323 KB
Volume
47
Category
Article
ISSN
0038-0938

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✦ Synopsis

The magnetic polarity distributions in sunspot groups which produced solar proton flares have been analyzed. It is shown that the fluid motion in sunspot groups and below may be responsible for the origin of inverted or unusual polarity distributions, since rotating motion in these spot groups is often observed. Since such motion seems to produce twisting of magnetic field lines above sunspot groups, the origin of solar flares seems to be closely dependent on instability associated with this twisting of sunspot field lines in the chromosphere and the lower corona.

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Investigations on the numerical calculation of the force-free magnetic field for solar active regions and its application, carried out by the author and his collaborators in recent years, is summarized. In this paper, some existing numerical calculations of constant a force-free fields for active re