Analysis of CME Deflections

CÉCERE, M.; SIEYRA, V.; CREMADES, H.; MIERLA, M.; STENBORG, G.; SAHADE, A.; COSTA, A.

San Juan

Congreso; Towards Future Research on Space Weather Drivers; 2019

Coronal mass ejections (CMEs) are the main drivers of geomagnetic storms. A com-prehensive study of their direction of propagation throughout both the lower solar corona andinterplanetary medium is a crucial first step to predict their potential geo-effectiveness. Sincethe early days of space-borne coronagraphy, the trajectory of CME events has been observedto be affected by the medium through which they propagate, deviations from their initial di-rection of propagation being the most easily noticeable effect. Therefore, to gain insight on thephysical 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 morphologicalproperties of the early CME development. In this talk we present a comprehensive morpho-logical and kinematical analysis of CME events, with emphasis on the characterization of theirearly development. In particular, we study the deflection experienced by a selected set ofevents observed by different space telescopes covering an ample range of heliocentric distancesand viewpoints (among them PROBA2/SWAP and SDO/AIA imagers, SOHO/LASCO coron-agraphs, and STEREO-SECCHI instruments suite). The selected events cover the time periodbetween October 2010 and October 2011.