TY CONF TI Study of the physical mechanism of a solar flare using MHD modeling over an active region: the onset of an extended surface of magnetic lines passing through a chain of current density maxima KW solar flare; current sheet; MHD simulation; active region JO Modern astronomy: from the Early Universe to exoplanets and black holes AU Podgorny, A.. AU Podgorny, I.. PY 2024 PB Special Astrophysical Observatory of the Russian Academy of Sciences