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Large Magnetic Flux Rope Formation in an X2.1 Flare observed on September 6, 2011
Arpita Roddanavar, Satoshi Inoue, Keiji Hayashi +3
Solar active region 11283 produced an X2.1 flare associated with a solar eruption on September 6, 2011. Observations revealed a preflare sigmoidal structure and a circular flare ri…
A Data-constrained Magnetohydrodynamic Simulation of Successive X-class Flares in Solar Active Region 13842. II. Dynamics of the Solar Eruption Associated with the X9.0 Solar Flare
Keitarou Matsumoto, Satoshi Inoue, Keiji Hayashi +5
Active region NOAA 13842 produced two successive solar flares: an X7.1-class flare on October 1, 2024, and an X9.0-class flare on October 3, 2024. This study continues our previous…
Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-Scale Flux Emergence
Satoshi Inoue, Takahiro Miyoshi, Keiji Hayashi +4
Despite decades of research, the fundamental processes involved in the initiation and acceleration of solar eruptions remain not fully understood, making them long-standing and cha…
A Data-constrained Magnetohydrodynamic Simulation of Successive X-class Flares in Solar Active Region 13842 I. Dynamics of the Solar Eruption Associated with the X7.1 Solar Flare
Keitarou Matsumoto, Satoshi Inoue, Nian Liu +3
We investigated the initiation and the evolution of an X7.1-class solar flare observed in solar active region NOAA 13842 on October 1, 2024, based on a data-constrained magnetohydr…
Extreme Red-wing Enhancements of UV Lines During the 2022 March 30 X1.3 Solar Flare
Yan Xu, Graham S. Kerr, Vanessa Polito +3
Here we present the study of a compact emission source during an X1.3 flare on 2022-March-30. Within a ~s period (17:34:48 UT to 17:35:29 UT), IRIS observations show spectr…
Coronal Magnetic Field Extrapolation and Topological Analysis of Fine-Scale Structures during Solar Flare Precursors
Wen He, Qiang Hu, Ju Jing +4
Magnetic field plays an important role in various solar eruptions like flares, coronal mass ejections, etc. The formation and evolution of characteristic magnetic field topology in…