Photospheric Magnetic Field Variations Related to Coronal Mass
Alejandro Lara
Abstract
In order to search for magnetic changes during coronal mass ejections (CMEs),
we follow the photospheric magnetic field evolution of solar active regions
during few days arround CME events. We use magnetograms from the
Michelson Doppler Imager (MDI) experiment on board of the Solar Heliospheric
Observatory (SOHO) to construct the time series of the photospheric magnetic
elements. We found variations in the magnetic flux over small areas
inside the active regions. The changes in the magnetic flux are related
to flare activity, although, the major variations seems to be related to
CMEs.
Authors: Alejandro Lara, Nat Gopalswamy
and Craig DeForest
Organization: The Catholic University of America
Telephone: (301) 286 8025
Fax: (301)
286 0264
e-mail: alara@antique.gsfc.nasa.gov
Address: NASA/GSFC
Mail Code 682.3 Building 26, room G-1
Greenbelt MD, 20771, USA