Slip-running reconnection signatures in solar flare ribbons

CRISTIANI, G.D.; LUONI, M.L.; CASTRO, J.I.; FRANCILE, C.N.; MANDRINI, C.H.

San Juan

Workshop; Towards Future Research on Space Weather Drivers; 2019

Solar flares are one of the most explosive phenomena in the solar atmosphere. Inthis work, we study the evolution of the X1.6 class solar flare that occurred in the active regionNOAA 12205 on 7 November 2014. We analyze data obtained with satellite instruments andground-based telescopes (AIA/SDO, HMI/SDO, and the Halpha Solar Telescope for Argentina(HASTA)). We describe the flare evolution in the optical and EUV ranges.We observe the slipping motions of small kernels located along flare ribbons and we interpretthem as a signature of slip-running reconnection occurring at coronal heights. We estimate thevelocity of the kernel displacement and compare it with an average coronal Alfven speed.