Homologous Compact Major Blowout-eruption Solar Flares and their Production of Broad CMEs

Abstract We analyze the formation mechanism of three homologous broad coronal mass ejections (CMEs) resulting from a series solar blowout-eruption flares with successively increasing intensities (M2.0, M2.6, and X1.0). The originated NOAA Active Region 12017 during 2014 March 28–29 within an interval ≈24 hr. Coronal magnetic field modeling based on nonlinear force-free extrapolation helps to identify low-lying closed bipolar loops flaring region enclosing flux ropes. obtain double rope system under fields for all events. sequential eruption ropes led flares, each followed by CME. Each CMEs formed eruptions gradually attained large angular width, after expanding compact eruption-source site. find these be consistent “magnetic-arch-blowout” scenario: compact-flare blowout was seated in one foot far-reaching arch, exploded up encasing leg blew out arch make