Producción de eyecciones coronales de masa del complejo de regiones activas 11121 y 11123

CREMADES, H.; MANDRINI, C.H.; SCHMIEDER, B.; CRESCITELLI, M.

Tandil

Congreso; 56 Reunión Anual de la Asociación Argentina de Astronomía; 2013

The complex formed by active regions 11121 and 11123 (NOAA numbers), approximately located on the solar central meridian oN 11 November 2010, was site of emergence of new magnetic bipoles, which produced the destabilization of active and quiescent filaments that were ejected as coronal mass ejections (CMEs) toward Earth. From its perspective, the events are observed by the AIA telescope aboard the Solar Dynamics Observatory (SDO) and the LASCO coronagraphs from the Solar and Heliospheric Observatory (SOHO). For this date the twin STEREO spacecraft were approximately 180o appart, i.e. observing the complex on the corresponding solar limbs and thus exceptionally the CMEs that originated there. The amount of events observed from Earth´s perspective and from the orthogonal provided by STEREO differs significantly. This reveals deciencies in current space weather forecasting, by missing alarms when there are no solar observations perpendicular to the Sun- Earth line.