NSSC OpenIR  > 空间科学部
Detailed analysis of dynamic evolution of three Active Regions at the photospheric level before flare and CME occurrence
Ye Yudong; Korsós M.B.; Erdélyi R.; Korsós, M.B. (korsos.marianna@csfk.mta.hu)
Department空间科学部
Source PublicationAdvances in Space Research
2017
ISSN0273-1177
Language英语
AbstractWe present a combined analysis of the applications of the weighted horizontal magnetic gradient (denoted as WGM in Korsós et al. (2015)) method and the magnetic helicity tool (Berger and Field, 1984) employed for three active regions (ARs), namely NOAA AR 11261, AR 11283 and AR 11429. We analysed the time series of photospheric data from the Solar Dynamics Observatory taken between August 2011 and March 2012. During this period the three ARs produced a series of flares (eight M- and six X-class) and coronal mass ejections (CMEs). AR 11261 had four M-class flares and one of them was accompanied by a fast CME. AR 11283 had similar activities with two M- and two X-class flares, but only with a slow CME. Finally, AR 11429 was the most powerful of the three ARs as it hosted five compact and large solar flare and CME eruptions. For applying the WGM method we employed the Debrecen sunspot data catalogue, and, for estimating the magnetic helicity at photospheric level we used the Space-weather HMI Active Region Patches (SHARP's) vector magnetograms from SDO/HMI (Solar Dynamics Observatory/Helioseismic and Magnetic Imager). We followed the evolution of the components of the WGM and the magnetic helicity before the flare and CME occurrences. We found a unique and mutually shared behaviour, called the U-shaped pattern, of the weighted distance component of WGM and of the shearing component of the helicity flux before the flare and CME eruptions. This common pattern is associated with the decreasing-receding phases yet reported only known to be a necessary feature prior to solar flare eruption(s) but found now at the same time in the evolution of the shearing helicity flux. This result leads to the conclusions that (i) the shearing motion of photospheric magnetic field may be a key driver for solar eruption in addition to the flux emerging process, and that (ii) the found decreasing-approaching pattern in the evolution of shearing helicity flux may be another precursor indicator for improving the forecasting of solar eruptions. © 2017.
Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6073
Collection空间科学部
Corresponding AuthorKorsós, M.B. (korsos.marianna@csfk.mta.hu)
Recommended Citation
GB/T 7714
Ye Yudong,Korsós M.B.,Erdélyi R.,et al. Detailed analysis of dynamic evolution of three Active Regions at the photospheric level before flare and CME occurrence[J]. Advances in Space Research,2017.
APA Ye Yudong,Korsós M.B.,Erdélyi R.,&Korsós, M.B. .(2017).Detailed analysis of dynamic evolution of three Active Regions at the photospheric level before flare and CME occurrence.Advances in Space Research.
MLA Ye Yudong,et al."Detailed analysis of dynamic evolution of three Active Regions at the photospheric level before flare and CME occurrence".Advances in Space Research (2017).
Files in This Item:
File Name/Size DocType Version Access License
2017S027311771730705(1334KB)期刊论文作者接受稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Ye Yudong]'s Articles
[Korsós M.B.]'s Articles
[Erdélyi R.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Ye Yudong]'s Articles
[Korsós M.B.]'s Articles
[Erdélyi R.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Ye Yudong]'s Articles
[Korsós M.B.]'s Articles
[Erdélyi R.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.