Photospheric field variations during the Oct. 28 and 29 solar events

Details Photospheric field variations during the Oct. 28 and 29 solar events Photospheric field variations during the Oct. 28 and 29 solar events

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsh51a..01l&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SH51A-01

Astronomy and Astrophysics

Astrophysics

7500 Solar Physics, Astrophysics, And Astronomy, 7513 Coronal Mass Ejections, 7519 Flares, 7524 Magnetic Fields, 7529 Photosphere

Scientific paper

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.

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