HR: 13:50h
AN: SM43D-02    [Abstracts]
TI: A Systematic Search of Solar Sources of Major Geomagnetic Storm
AU: * Zhang, J
EM: jiez@scs.gmu.edu
AF: George Mason University, 4400 University Dr., MSN 5C3, Fairfax, VA 22030 United States
AU: Poomvises, W
EM: wpoomvis@gmu.edu
AF: George Mason University, 4400 University Dr., MSN 5C3, Fairfax, VA 22030 United States
AB: A systematic process of identifying solar sources of major geomagnetic storms is presented. From 1996 to 2004, there are 77 major geomagnetic storms (defined as Dst <= -100). For each of the 77 events, we make use combined remote-sensing solar observations and in-situ solar-wind data to identify their possible sources. The data include (1) solar wind plasma and magnetic observations in near-Earth space from ACE and WIND experiments, (2) solar CME observations from the LASCO (Large Angle and Spectrometric Coronagraph) on SOHO, (3) coronal observations from the EIT (Extreme Ultraviolet Imaging Telescope) on SOHO, and (4) other synoptic solar observations including flares and filament eruptions. Solar wind data are necessary in the identification process because it provides constraints on the duration of backward search window. A major geomagnetic storm may be caused by (1) a single halo CME, (2) multiple halo CMEs, or (3) CIR (corotating interaction region). The properties of those responsible solar events will be discussed.
DE: 2788 Storms and substorms
DE: 7513 Coronal mass ejections
DE: 7519 Flares
DE: 7531 Prominence eruptions
SC: SPA-Magnetospheric Physics [SM]
MN: 2005 Joint Assembly