The Largest Active Region of the Solar Cycle

Details The Largest Active Region of the Solar Cycle The Largest Active Region of the Solar Cycle

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsh11c0730k&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SH11C-0730

Computer Science

Sound

7522 Helioseismology, 7524 Magnetic Fields, 7536 Solar Activity Cycle (2162), 7537 Solar And Stellar Variability, 7544 Stellar Interiors And Dynamo Theory

Scientific paper

The largest and most active sunspot region of the current solar cycle (known as AR 9393) was observed by the MDI instrument on SOHO continuously during three solar rotations in March-May 2001. On April 2 this active region produced the largest solar flare of the last 25 years. By using time-distance helioseismology we have investigated the development of the active region in the solar interior during that period starting from the processes of emergence. We present tomographic images of the sound-speed structures associated with this active region up to 100 Mm below the solar surface, and discuss their relation to the evolution of the surface magnetic field.

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