The CME-productivity associated with flares from two active regions |
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Institution: | 1. Department of Physics, The Catholic University of America, 200 Hannan Hall, Washington, DC 20064, USA;2. NASA Goddard Space Flight Center, Code 695.0, Greenbelt, MD 20771, USA |
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Abstract: | We report on two flare-productive adjacent active regions (ARs), with different levels of coronal mass ejection (CME) association. AR 10039 and AR 10044 produced strong X-ray flares during their disk passages. We examined the CME association rate of X-ray flares and found it 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 14%. CMEs from the CME-rich AR were faster and wider than the ones from the CME-poor AR. The flare activity of AR 10044 was temporally concentrated over a short interval and spatially localized over a compact area between the major sun spots. We suggest that different pre-eruption evolution and magnetic configuration in the two regions might have contributed to the difference between the two ARs. |
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