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We report a detailed event analysis on the M6.6-class flare in the active region (AR) NOAA 11158 on 2011 February 13. AR 11158, which consisted of two major emerging bipoles, showed prominent activities including one X- and several M-class…

Solar and Stellar Astrophysics · Physics 2015-06-16 Shin Toriumi , Yusuke Iida , Yumi Bamba , Kanya Kusano , Shinsuke Imada , Satoshi Inoue

We analyze multi-wavelength data of a M7.9/1N class solar flare which occurred on 27 April, 2006 from AR NOAA 10875. GOES soft X-ray images provide the most likely signature of two interacting loops and their reconnection, which triggers…

Solar and Stellar Astrophysics · Physics 2015-05-19 Pankaj Kumar , A. K. Srivastava , B. V. Somov , P. K. Manoharan , R. Erdelyi , Wahab Uddin

We report a solar jet phenomenon associated with successive flares on November 10th 2014. These explosive events were involved with the satellite spots' emergence around a delta-type sunspot in the decaying active region NOAA 12205. The…

Solar and Stellar Astrophysics · Physics 2017-10-11 Takahito Sakaue , Akiko Tei , Ayumi Asai , Satoru Ueno , Kiyoshi Ichimoto , Kazunari Shibata

Double-decker filaments and their eruptions have been widely observed in recent years, but their physical formation mechanism is still unclear. Using high spatiotemporal resolution, multi-wavelength observations taken by the New Vacuum…

Solar and Stellar Astrophysics · Physics 2024-01-23 Yuandeng Shen , Dongxu Liu , Surui Yao , Chengrui Zhou , Zehao Tang , Zhining Qu , Xinping Zhou , Yadan Duan , Song Tan , Ahmed Ahmed Ibrahim

We present the observations of a quiescent filament eruption and its deflection from the radial direction. The event occurred in the southern solar hemisphere on 2021 May 9 and was observed by the Atmospheric Imaging Assembly (AIA) on board…

Solar and Stellar Astrophysics · Physics 2024-11-18 K. Koleva , R. Chandra , P. Duchlev , P. Devi

The solar magnetic field in a flare-producing active region (AR) is much more complicated than theoretical models, which assume a very simple magnetic field structure. The X1.0 flare, which occurred in AR 12192 on 2014 October 25, showed a…

Solar and Stellar Astrophysics · Physics 2017-04-05 Yumi Bamba , Satoshi Inoue , Kanya Kusano , Daikou Shiota

Flare ribbons with parallel and circular morphologies are typically associated with different magnetic reconnection models, and the simultaneous observation of both types in a single event remains rare. Using multi-wavelength observations…

Solar and Stellar Astrophysics · Physics 2025-11-03 Ruifei Huang , Hao Ning , Ze Zhong , Ye Qiu , Zhenyong Hou , Yang Su , Chuan Li , Xiangliang Kong , Yao Chen

Magnetic flux ropes play a key role in triggering solar flares in the solar atmosphere. In this paper, we investigate the evolution of active region NOAA 12268 within 36 hours from 2015 January 29 to 30, during which a flux rope was formed…

Solar and Stellar Astrophysics · Physics 2019-06-12 Z. Zhong , Y. Guo , M. D. Ding , C. Fang , Q. Hao

Solar eruptions occurring at different places within a relatively short time interval are considered to be sympathetic. However, it is difficult to determine whether there exists a cause and effect between them. Here we study a failed and a…

Solar and Stellar Astrophysics · Physics 2019-01-04 Dong Wang , Rui Liu , Yuming Wang , Tingyu Gou , Quanhao Zhang , Zhenjun Zhou , Min Zhang

A filament eruption, accompanied by a B9.5 flare, coronal dimming and an EUV wave, was observed by the Solar TERrestrial Relations Observatory (STEREO) on 19 May 2007, beginning at about 13:00 UT. Here, we use observations from the…

Solar and Stellar Astrophysics · Physics 2015-05-13 P. C. Liewer , E. M. De Jong , J. R. Hall , R. A. Howard , W. T. Thompson , J. L. Culhane , Laura Bone , L. van Driel-Gesztelyi

Solar eruptions are sudden ejections of coronal mass and magnetic fields accompanied by intense energy release. The eruptive structure does not always erupt successfully, but sometimes fails to escape the Sun after initiation. The failure…

Solar and Stellar Astrophysics · Physics 2026-05-21 Tingyu Gou , Katharine K. Reeves , Peter R. Young , Astrid M. Veronig , Xingyao Chen , Sijie Yu , Bin Chen , Bin Zhuang

It is not fully understood why some solar filaments erupt while others do not. Those that do typically undergo a slow rise followed by an acceleration phase, though this transition requires further investigation. Erupting prominences have…

Solar and Stellar Astrophysics · Physics 2026-03-25 Dion Donné , Yuhao Zhou , Hebe Cremades , Rony Keppens

We analyze the temporal evolution of the three-dimensional (3D) magnetic structure of the flaring active region (AR) NOAA 10930 by using the nonlinear force-free fields extrapolated from the photospheric vector magnetic fields observed by…

Solar and Stellar Astrophysics · Physics 2015-06-11 S. Inoue , D. Shiota , T. T. Yamamoto , V. S. Pandey , T. Magara , G. S. Choe

A solar jet on 2014 July 31, which was accompanied by a GOES C1.3 flare and a mini-filament eruption at the jet base, was studied by using observations taken by the New Vacuum Solar Telescope and the Solar Dynamic Observatory. Magnetic…

Solar and Stellar Astrophysics · Physics 2019-11-11 Yuandeng Shen , Zhining Qu , Chengrui Zhou , Yadan Duan , Zehao Tang , Ding Yuan

Using the H$\alpha$ data from the New Vacuum Solar Telescope (NVST) at the Fuxian Solar Observatory together with multi-wavelength images and magnetograms obtained by Solar Dynamics Observatory (SDO), we study the detailed process of three…

Solar and Stellar Astrophysics · Physics 2020-01-08 Guorong Chen , Xiaoli Yan

We study an EUV confined ejection observed on 09 May 2012 in active region (AR) NOAA 11476. For the analysis we use observations in multiple wavelengths (EUV, X-rays, H$\alpha$, and magnetograms) from a variety of ground-based and space…

A filament eruption was observed with the Siberian Solar Radio Telescope (SSRT) on June 23 2012, starting around 06:40 UT, beyond the West limb. The filament could be followed in SSRT images to heights above 1 Rs, and coincided with the…

Solar and Stellar Astrophysics · Physics 2015-06-17 C. E. Alissandrakis , A. A. Kochanov , S. Patsourakos , A. T. Altyntsev , S. V. Lesovoi , N. N. Lesovoya

We report microwave spectral imaging observations of an erupting magnetic flux rope during the early impulsive phase of the X8.2-class limb flare on 2017 September 10, obtained by the Expanded Owens Valley Solar Array. A few days prior to…

Solar and Stellar Astrophysics · Physics 2020-06-10 Bin Chen , Sijie Yu , Katharine K. Reeves , Dale E. Gary

We report one of several homologous non-radial eruptions from NOAA active region (AR) 11158 that are strongly modulated by the local magnetic field as observed with the Solar Dynamic Observatory (SDO). A small bipole emerged in the sunspot…

Solar and Stellar Astrophysics · Physics 2015-06-11 Xudong Sun , Todd Hoeksema , Yang Liu , Qingrong Chen , Keiji Hayashi

Filament eruptions and hard X-ray (HXR) source motions are commonly observed in solar flares, which provides critical information on the coronal magnetic reconnection. This Letter reports an event on 2005 January 15, in which we found an…

Solar and Stellar Astrophysics · Physics 2015-05-19 Chang Liu , Jeongwoo Lee , Ju Jing , Rui Liu , Na Deng , Haimin Wang
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