34th Solar Physics Division Meeting, June 2003
Session 5 Coronal Mass Ejections I
Poster, Monday, June 16, 2003, 3:30-5:00pm, Mezzanine

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[5.02] Search for CME Related Changes in 1-min GONG+ Magnetograms

Y. Li (SSL UCB, CA)

By October 2001 all six sites of GONG+ network are completed and started the observations. It is designed that the network produces one magnetogram evey minute continously with 1024x1024 spacial resolution. Although the calibration of the images have not been perfected, in this poster we attempt to use GONG+ magnetograms to examine qualititively whether any change of the solar photospheric field can be detected in the GONG+ magnetogram data with very high cadence around CME occurences. One event used will be a Halo CME at 16:50 on 19Oct2001, with a flare from AR9661. This was a fast CME with speed of 900km/s, caused a geomagnetic storm starting late 21Oct2001 with Dst minimum at -180nT. Varies parameters will be studied including magnetic field value changes at the active region and full disk scales.


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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.