On the Seismicity of September 7, 2011 X1.8-class Flare

Abstract

We present results of our preliminary analysis of acoustically active X-class flare of September 7, 2011. We report two acoustic sources detected via acoustic holography and verified by finding a ridge in time-distance diagrams. We compare the directional information extracted from time-distance and acoustic holography, showing a good agreement in this case. We report that the direction where amplitude of the wave-front is the largest lies through the strong magnetic field and sunspot, suggesting that absorption of the acoustic wave power by magnetic field can be ruled out as a wave anisotropy mechanism in this case.

Proceedings of "Eclipse on the Coral Sea: Cycle 24 Ascending GONG 2012/LWS/SDO-5/SOHO-27" meeting, November 12-16, 2012, Palm Cove, Queensland

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Cited by in corpus (7)

• Evolution of Flare Ribbons, Electric Currents and Quasi-separatrix Layers During an X-class Flare
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• Spectroscopic Signatures Related to a Sunquake
• A statistical correlation of sunquakes based on their seismic, white light, and X-ray emission
• Gradual Magnetic Evolution of Sunspot Structure and Filament-Corona Dynamics Associated with the X1.8 Flare in AR 11283
• A Comparison Study of a Solar Active-Region Eruptive Filament and a Neighboring Non-Eruptive Filament
• Energy release in the solar atmosphere from a stream of infalling prominence debris