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The Role of a Tiny Brightening in a Huge Geoeffective Solar Eruption Leading to the St. Patrick’s Day Storm
Bamba,Yumi1; Inoue,Satoshi2; Hayashi,Keiji2,3,4
2019-03-26
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume874Issue:1
AbstractAbstract The largest magnetic storm in solar cycle 24 was caused by a fast coronal mass ejection (CME) that was related to a small C9.1 flare that occurred on 2015 March 15 in solar active region (AR) NOAA 12297. The purpose of this study is to understand the onset mechanism of the geoeffective huge solar eruption. We focused on the C2.4 flare that occurred prior to the C9.1 flare of the filament eruption. The magnetic field structure in the AR was complicated: there were several filaments, including the one that erupted and caused the CME. We hence carefully investigated the photospheric magnetic field, brightenings observed in the solar atmosphere, and the 3D coronal magnetic field extrapolated from nonlinear force-free field modeling, using data from Hinode and Solar Dynamics Observatory. We found three intriguing points. (1) There was a compact but noticeably highly twisted magnetic field structure that is represented by a small filament in the C2.4 flaring region, where a tiny precursor brightening (PB) was observed before the C2.4 flare. (2) The C2.4 flaring region is located in the vicinity of a foot point of the closed field that prohibits the filament from erupting. (3) The filament shows a sudden eruption after the C2.4 flare and the accompanying small filament eruption. From our analysis, we suggest that a small magnetic disturbance that was represented by the tiny PB at the time of the C2.4 flare is related to the trigger of the huge filament eruption.
Keywordsolar–terrestrial relations Sun: coronal mass ejections (CMEs) Sun: filaments, prominences Sun: flares Sun: magnetic fields
DOI10.3847/1538-4357/ab06ff
Language英语
WOS IDIOP:0004-637X-874-1-ab06ff
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/28800
Collection中国科学院国家天文台
Affiliation1.Institute of Space and Astronautical Science (ISAS)/Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan; y-bamba@nagoya-u.jp
2.Institute for Space-Earth Environmental Research (ISEE)/Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
3.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China
4.State Key Laboratory for Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
Recommended Citation
GB/T 7714
Bamba,Yumi,Inoue,Satoshi,Hayashi,Keiji. The Role of a Tiny Brightening in a Huge Geoeffective Solar Eruption Leading to the St. Patrick’s Day Storm[J]. The Astrophysical Journal,2019,874(1).
APA Bamba,Yumi,Inoue,Satoshi,&Hayashi,Keiji.(2019).The Role of a Tiny Brightening in a Huge Geoeffective Solar Eruption Leading to the St. Patrick’s Day Storm.The Astrophysical Journal,874(1).
MLA Bamba,Yumi,et al."The Role of a Tiny Brightening in a Huge Geoeffective Solar Eruption Leading to the St. Patrick’s Day Storm".The Astrophysical Journal 874.1(2019).
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