Analysis of CME deflections

CÉCERE, M.; SIEYRA, M.V.; CREMADES, H.; MIERLA, M.; STENBORG, G.; SAHADE, A.; COSTA, A.; PROBA-2 TEAM

San Juan

Congreso; Towards Future Research on Space Weather Drivers; 2019

oronal Mass Ejections (CME) are the main drivers of geomagnetic storms. A comprehensive study of their direction of propagation throughout both the lower solar corona and interplanetary medium is a crucial first step to predict their potential geo-effectiveness. Since the early days of space-borne coronagraphy, the trajectory of CME events has been observed to be affected by the medium through which they propagate, deviations from their initial direction of propagation being the most easily noticeable effect. Therefore, to gain insight on the physical mechanisms at work as the CME events propagate through the coronal environment, it is of crucial importance the systematic study of both the kinematical and the morphological properties of the early CME development. In this talk we present a comprehensive morphological and kinematical analysis of CME events, with emphasis on the characterization of their early development. In particular, we study the deflection experienced by a selected set of events observed by different space telescopes covering an ample range of heliocentric distances and viewpoints (among them PROBA2/SWAP and SDO/AIA imagers, SOHO/LASCO coronagraphs, and STEREO-SECCHI instruments suite). The selected events cover the time period between October 2010 and October 2011.