Slip-running reconnection signatures in solar-flare ribbons

LUONI, M. L.; CRISTIANI, G.; FRANCILE, C.; MANDRINI, C.H.

San Juan

Congreso; Towards Future Research on Space Weather Drivers; 2019

IAFE - UNSJ - UTN FR Mendoza - OAFA - ICATE

Solar flares are one of the most explosive phenomena in the solar atmosphere. In this work, we study the evolution of the X1.6 class solar flare that occurred in the active region NOAA 12205 on 7 November 2014. We analyze data obtained with satellite instruments and ground-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 interpret them as a signature of slip-running reconnection occurring at coronal heights. We estimate the velocity of the kernel displacement and compare it with an average coronal Alfven speed.