Study of magnetic flux emergence and related activity in active region NOAA 10314

M. POISSON; M. LÓPEZ FUENTES; C. H. MANDRINI; P. DÉMOULIN

Mendoza

Simposio; IAU Symposium 286 Comparative Magnetic Minima: Characterizing quiet times in the Sun and Stars; 2011

Instituto de Astronomía y Física del Espacio

We study the emergence of AR NOAA 10314, observed on the solar disk during March 13-19, 2003. This extremely complex AR is of particular interest for being the source of two major (X class) flares and several other energetic events along a few days. Using SOHO/MDI magnetograms we follow the evolution of the photospheric magnetic flux to infer the morphology of the structure that originates the AR. Combining these observations with coronal data from SOHO/EIT, we analyze the detailed relation between the production of flares and the photospheric evolution during the magnetic structure emergence. We determine the tilt angle variation for the δ-spot and find a counter-clockwise rotation corresponding to a positive writhed flux tube.