Abstract:Based on the vector magnetograms obtained from the SDO/HMI, we calculate the line-of-sight current density distribution of the active region on 2017 September 6, using the integral form of Ampere's law. Comparing the distribution of the current density and the observed flare, we find that: Firstly, the changing trend of the total current density of the active region was consistent with the change of the X-ray flux of the X9.3 flare. Secondly, the distribution of the double-ribbon flare was co-spatial with a pa… Show more
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