Temporal characteristics of solar soft X-ray and Hα flares

Details Temporal characteristics of solar soft X-ray and Hα flares Temporal characteristics of solar soft X-ray and Hα flares

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.477..187v&link_type=abstract

In: Proceedings of the Second Solar Cycle and Space Weather Euroconference, 24 - 29 September 2001, Vico Equense, Italy. Editor:

Physics

2

Sun: Flares, Sun: X-Rays, Sun: Hα, Methods: Statistical

Scientific paper

Temporal aspects of solar soft X-ray and Hα flares for the period 1997-2000 are investigated. For the considered time span about 8400 SXR and 11400 Hα flares are reported in the SGD. Related flares observed in Hα as well as in SXR are identified amounting to about 2100 events. Correlations among corresponding SXR and Hα events are analyzed and their relative timing is investigated. From the timing analysis we infer that for most of the events (84%) the start of the Hα emission is delayed with respect to the SXR emission. On average, the Hα flare starts 3 minutes after the SXR flare. The peaks occur preferentially simultaneously with a slight tendency that the Hα peak precedes the SXR peak.

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