AAS 195th Meeting, January 2000
Session 107. The Sun
Display, Saturday, January 15, 2000, 9:20am-4:00pm, Grand Hall

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[107.06] Analysis of Pre-Flare Chromospheric Surface Motions Using H Alpha Synoptic Data

R. A. Gutermuth (NSO/SP, Alfred University)

I reduced the series of observations taken with the NSO/SP Hilltop H\alpha full disk flare patrol telescope on 1998 May 6. Using local correlation techniques, I derived horizontal surface flows for active region NOAA 8214 from the H\alpha images. I then compared these with the line-of-sight magnetic flux of the region and structures seen in the H\alpha images. My research was focused on pre-activity signatures.

My analysis of these data has revealed two distinct spikes in the curl of the surface velocity fields prior to activity observed. This result agrees with results obtained by Balasubramaniam, Milano, and Keil (1998) and Keil et al (1999), increasing the amount of evidence supporting the idea that these events are often precursors to later solar activity.

My participation in this research was funded by the Research Experiences for Undergraduates program of the NSF and NSO.

If you would like more information about this abstract, please follow the link to http://merlin.alfred.edu/~gutermra/nso.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: gutermra@alfred.edu

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