Disclaimer: The following material is being kept online for archival purposes.

Although accurate at the time of publication, it is no longer being updated. The page may contain broken links or outdated information, and parts may not function in current web browsers.

Photospheric Magnetic Field Variations Related to Coronal Mass

Alejandro Lara


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

Above is background material for archival reference only.

NASA Logo, National Aeronautics and Space Administration
NASA Official: Adam Szabo

Curators: Robert Candey, Alex Young, Tamara Kovalick

NASA Privacy, Security, Notices