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We investigate the coronal and interplanetary evolution of a coronal massejection (CME) launched on 2010 September 4 from a source region linking twoactive regions (ARs) 11101 and 11103, using extreme ultraviolet imaging,magnetogram, white-light and in situ observations from SDO, STEREO, SOHO, VEXand Wind. A potential-field source-surface model is employed to examine theconfiguration of the coronal magnetic field surrounding the source region. Thegraduated cylindrical shell model and a triangulation method are applied todetermine the kinematics of the CME in the corona and interplanetary space.From the remote sensing and in situ observations we obtain some key results:(1) the CME was deflected in both the eastward and southward directions in thelow corona by the magnetic pressure from the two ARs and possibly interactedwith another ejection, which caused that the CME arrived at VEX that waslongitudinally distant from the source region; (2) although VEX was closer tothe Sun, the observed and derived CME arrival times at VEX are not earlier thanthose at Wind, which suggests the importance of determining both the frontalshape and propagation direction of the CME in interplanetary space; (3) theICME was compressed in the radial direction while the longitudinal transversesize was extended.

Multi-spacecraft Observations of the Coronal and Interplanetary Evolution of a Solar Eruption Associated with Two Active Regions