Subphotospheric Dynamics During the Period of Massive Solar Flares

Details Subphotospheric Dynamics During the Period of Massive Solar Flares Subphotospheric Dynamics During the Period of Massive Solar Flares

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.4703k&link_type=abstract

American Astronomical Society Meeting 204, #47.03; Bulletin of the American Astronomical Society, Vol. 36, p.737

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Unstable coronal structures that lead to impulsive energy release in solar flares are created by magnetic flux emergence and by photospheric and subphotospheric motions shearing and twisting magnetic field lines. We present results of investigation of subsurface plasma flows and emerging structures associated with AR 10484, 10486, and 10488, which produced the majority of massive flares of October-November 2003. The results representing 3-D maps of sound-speed perturbations and flow velocities are obtained from SOHO/MDI full-disk Doppler data by time-distance helioseismology with the horizontal resolution of 3 Mm, vertical resolution of 0.7-4 Mm (in the depth range of 0-40 Mm), and temporal resolution of 8 hours. These maps are compared with the corresponding MDI magnetograms, and also with TRACE and RHESSI images to determine the role of subphotospheric dynamics in the development of the active regions and their flaring activity.

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