The CME-productivity associated with flares from two ARs
Abstract
NOAA active region AR 10039 appeared at the east limb on 21 July 2002 and rotated out of the earthside on 4 August This AR was magnetically complex consisting of a spot group with a beta-gamma delta BGD configuration from the start It produced 3 X- and 8 M-Class X-ray flares during its disk passage NOAA AR 10044 located just to the southwest of AR 10039 developed gradually into a BGD configuration on 26 July and produced 9 M-class flares We examined the coronal mass ejection CME associations rate R of these X-ray flares using data from the Large Angle Spectrometric Coronagraph LASCO on board the Solar and Heliospheric Observatory SOHO We found the CME-productivity to be different between the two ARs AR 10039 was CME-rich with 72 association with flares while AR 10044 was CME-poor with an association rate of only 13 We also calculated the average velocity and angular width of CMEs from the two ARs On the average the CMEs from the CME-rich AR were faster 1195 km s and wider 246 deg than the ones from the CME-poor AR 282 km s and 12 deg We discuss the characteristics of the ARs which might have resulted in the observed differences
- Publication:
-
36th COSPAR Scientific Assembly
- Pub Date:
- 2006
- Bibcode:
- 2006cosp...36..556A