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Helioseismic observations of magnetic flux emergence and flare effects

Published online by Cambridge University Press:  01 November 2006

A. G. Kosovichev  and
T. L. Duvall
A. G. Kosovichev
Affiliation:
Stanford University, Stanford, CA 94305, USA
T. L. Duvall
Affiliation:
NASA GSFC, Greenbelt, MD 20771, USA
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Abstract

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Time-distance helioseismology and data from SOHO/MDI are used for obtaining 3D images of subsurface sound-speed perturbations and maps of plasma flows, associated with emerging magnetic flux and flaring activity of large active regions in October 2003. The results reveal extremely complicated dynamical processes in the upper convection zone and indicate that subsurface shear flows may play an important role in magnetic energy release in solar flares. Strong X-class flares generated impulsive seismic waves (“sunquakes”), traveling through surrounding sunspots, thus providing new insight into the interaction of seismic waves with magnetic fields.

Keywords

Sun: helioseismologyinteriormagnetic fieldsoscillationssunspotsflaresparticle emissionX-raysgamma rays
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S233: Solar Activity and its Magnetic Origin , March 2006 , pp. 365 - 368
Copyright
© 2006 International Astronomical Union