The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 43 Issue 1
- /
- Pages.54.2-54.2
- /
- 2018
- /
- 1226-2692(pISSN)
Magnetic and kinematic characteristics of very fast CMEs
- Jang, Soojeong (School of Space Research, Kyung Hee University) ;
-
Moon, Yong-Jae
(School of Space Research, Kyung Hee University) ;
- Lim, Daye (School of Space Research, Kyung Hee University) ;
- Lee, Jae-Ok (Korea Astronomy and Space Science Institute) ;
- Lee, Harim (School of Space Research, Kyung Hee University) ;
- Park, Eunsu (School of Space Research, Kyung Hee University)
- Published : 2018.05.08
Abstract
It is important to understand very fast CMEs which are the main cause of geomagnetic storms and solar particle events (SPEs). During this solar cycle 24, there are 10 very fast CMEs whose speeds are over 2000 km/s. Among these, there were only two fronside events (2012 January 23 and 2012 March 7) and they are associated with two major flares (M8.7 and X5.4) and the most strong SPEs (6310 pfu and 6530 pfu). They have a similar characteristics: there were successive CMEs within 2 hours in the same active region. We analyze their magnetic properties using SDO HMI magnetograms and kinematic ones from STEREO EUVI/COR1/COR2 observations. We can measure their speeds and initial accelerations without projection effects because their source locations are almost the limb. Additionally, we are investigating magnetic and kinematic characteristics of 8 backside events using AI-generated magnetograms constructed by deep learning methods.
Keywords