Anisotropy of Helioseismic Waves Excited by Solar Flares

Details Anisotropy of Helioseismic Waves Excited by Solar Flares Anisotropy of Helioseismic Waves Excited by Solar Flares

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh23a0335k&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH23A-0335

Physics

7519 Flares, 7522 Helioseismology

Scientific paper

Recent observations of helioseismic response to solar flares ("sunquakes") revealed strong anisotropy in the seismic wave amplitude. It appears that the acoustic waves excited by solar flares and propagating through the solar interior have the strongest amplitude in the direction of the expansion of the flare ribbons. Our analysis of the flare data from SOHO/MDI and RHESSI, and modeling of sunquakes show that this anisotropy is likely to be caused by moving seismic sources. These sources correspond to the places where high-energy particles penetrate into the lower atmosphere of the Sun, and their motion is related to the dynamics of the magnetic reconnection process in the corona.

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