177 citations · 610 across the 13 of their papers we have counts for
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Forecasting Solar Flares Using Magnetogram-based Predictors and Machine Learning
Kostas Florios, Ioannis Kontogiannis, Sung-Hong Park +4
We propose a forecasting approach for solar flares based on data from Solar Cycle 24, taken by the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory (S…
First simultaneous SST/CRISP and IRIS observations of a small-scale quiet Sun vortex
S. -H. Park, G. Tsiropoula, I. Kontogiannis +3
Ubiquitous small-scale vortices have recently been found in the lower atmosphere of the quiet Sun in state-of-the-art solar observations and in numerical simulations. We investigat…
Development of Technique to Detect and Classify Small-Scale Magnetic Flux Cancellation and Rapid Blueshifted Excursions
Xin Chen, Na Deng, Derek A. Lamb +5
We present a set of tools for detecting small-scale solar magnetic cancellations and the disk counterpart of type II spicules (the so-called Rapid Blueshifted Excursions (RBEs)), u…
Study of Magnetic Helicity Injection in the Active Regions NOAA 9236 Producing Multiple Flare-associated CME Events
Sung-Hong Park, Kanya Kusano, Kyung-Suk Cho +6
To better understand a preferred magnetic field configuration and its evolution during Coronal Mass Ejection events, we investigated the spatial and temporal evolution of photosphe…
Multiwavelength study of a Solar Eruption from AR NOAA 11112: II. Large-Scale Coronal Wave and Loop Oscillation
Pankaj Kumar, K. -S. Cho, P. F. Chen +2
We analyse multiwavelength observations of an M2.9/1N flare that occurred in AR NOAA 11112 on 16 October 2010. AIA 211 Å EUV images reveal the presence of a faster coronal wave (de…
Multiwavelength study of a Solar Eruption from AR NOAA 11112 I. Flux Emergence, Sunspot Rotation and Triggering of a Solar Flare
Pankaj Kumar, Sung-Hong Park, K. -S. Cho +1
We analyse the multiwavelength observations of an M2.9/1N flare that occurred in the active region (AR) NOAA 11112 in the vicinity of a huge filament system on 16 October 2010. SDO…
The Occurrence and Speed of CMEs Related to Two Characteristic Evolution Patterns of Helicity Injection in Their Solar Source Regions
Sung-Hong Park, Kyung-Suk Cho, Su-Chan Bong +4
Long-term (a few days) variation of magnetic helicity injection was calculated for 28 solar active regions which produced 47 CMEs to find its relationships with the CME occurrence…
Initiation of CME and Associated Flare Caused by Helical Kink Instability Observed by SDO/AIA
Pankaj Kumar, K. -S. Cho, S. -C. Bong +2
In this paper, we present multiwavelength observations of helical kink instability as a trigger of a CME which occurred in AR NOAA 11163 on 24 February 2011. The CME was associated…
Gradual Inflation of Active-Region Coronal Arcades Building up to Coronal Mass Ejections
Rui Liu, Chang Liu, Sung-Hong Park +1
The pre-CME structure is of great importance to understanding the origin of CMEs, which, however, has been largely unknown for CMEs originating from active regions. In this paper,…
Time Evolution of Coronal Magnetic Helicity in the Flaring Active Region NOAA 10930
Sung-Hong Park, Jongchul Chae, Ju Jing +2
To study the three-dimensional (3D) magnetic field topology and its long-term evolution associated with the X3.4 flare of 2006 December 13, we investigate the coronal relative magn…
Productivity of Solar Flares and Magnetic Helicity Injection in Active Regions
Sung-Hong Park, Jongchul Chae, Haimin Wang
The main objective of this study is to better understand how magnetic helicity injection in an active region is related to the occurrence and intensity of solar flares. We therefor…
The variation of relative magnetic helicity around major flares
Sung-Hong Park, Jeongwoo Lee, Gwang-Son Choe +5
We have investigated the variation of magnetic helicity over a span of several days around the times of 11 X-class flares which occurred in seven active regions (NOAA 9672, 10030,…