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EP: Extraterrestrische Physik

EP 3: Sonne und Heliosph
äre I

EP 3.2: Talk

Tuesday, March 21, 2000, 15:30–15:45, H1

Solar flare observations from SOHO, MICA and YOHKOH in relation with a coronal shock wave — •Guillermo Stenborg, Davina Innes, and Rainer Schwenn — Max-Planck-Institut für Aeronomie (MPAe), Max-Planck-Str. 2, 37191 Katlenburg-Lindau

A limb flare (strength M7.6) was observed on May 9, 1999. Simultaneously with a fast X-ray plasmoid ejection (YOHKOH), a circular emission front was seen in coronagraph images (MICA). The projected velocity was about 500 km/sec, consistent with the very high velocity Doppler shifts (equivalent to about 600 km/sec) determined from the Fe XX emission line (SUMER/SOHO). This unique set of observations suggests that a blast wave initiated by the flare was propagating through the overlying coronal arcade. We present the observational evidence related to this event.