2026/06/01 by L. K. Harra, K. Kusano, Yingjie Zhu +6 · 1 voice
Physics and Astronomy · Earth and Planetary Sciences · #Solar and Space Plasma Dynamics #Ionosphere and magnetosphere dynamics #Earthquake Detection and Analysis
paper · doi:10.1007/s11207-026-02691-5
openalex publication_date 2026/06/01 · openalex created_date 2026/06/18 · openalex updated_date 2026/07/23
) to determine whether regions with high free magnetic energy in the photosphere show related dynamics in the corona. We studied two large solar flares from the same active region on 19 and 20 March 2024. We found that the two identified magnetic regions with high free energy also had frequent small spatial scale EUV intensity changes as highlighted through the standard deviation of the imaging data. The standard deviation enhancement in these regions peaked at least two minutes before the GOES X-ray emission and was close in time to the peak of the non-thermal emission, providing an additional method to identify the early flare trigger location and start. Supplementary Information: The online version contains supplementary material available at 10.1007/s11207-026-02691-5.