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Sunspot Rotation and the M-class Flare in Solar Active Region NOAA 11158 View all abstracts by submitter

Yang Liu   Submitted: 2015-08-08 09:31

In this paper, we measure the rotation of a sunspot in solar active region NOAA 11158 (Solar Target Identifier SOL2011-02-15) that was associated with anM-class flare. The flare occurred when the rotation rate of the sunspot reached its maximum. We further calculate the energy in the corona produced by the sunspot rotation. The energy accumulated in the corona before the flare reached 5.5? 1032 erg, sufficient for energy requirements for a moderately big solar eruption. This suggests that sunspot rotation, which is often observed in solar active regions, is an effective mechanism for building up magnetic energy in the corona.

Authors: Alexander Li, Yang Liu
Projects: SDO-HMI

Publication Status: Solar Physics Accepted
Last Modified: 2015-08-10 11:13
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