Photospheric field variations during the Oct. 28 and 29 solar events
Abstract
Solar photospheric magnetic field variations around the Oct. 28th and 29th, 2003 large flares and CMEs are investigated. The essential data for the study are the high cadence MDI full disk line of sight magnetograms. Abrupt and permanent changes of the field strength occur at the times of both X-flares (Oct. 28, ~10:30UT and Oct. 29, 20:45UT). GONG+ magnetograms are used to provide a possible confirmation of the observed field changes. Velocity fields in the CME related active region and their evolution around the time of the events are obtained using the Local Correlation Tracking (LCT) technique on the MDI magnetograms. Some Mees/IVM vector magnetic field data analysis results may also likely be available.This level of observation of major active region fields spawning superstorm conditions is unprecedented.
- Publication:
-
AGU Spring Meeting Abstracts
- Pub Date:
- May 2004
- Bibcode:
- 2004AGUSMSH51A..01L
- Keywords:
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- 7500 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7513 Coronal mass ejections;
- 7519 Flares;
- 7524 Magnetic fields;
- 7529 Photosphere