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We use STEREO imagery to study the morphology of a shock driven by a fastcoronal mass ejection (CME) launched from the Sun on 2011 March 7. The sourceregion of the CME is located just to the east of a coronal hole. The CME ejectais deflected away from the hole, in contrast with the shock, which readilyexpands into the fast outflow from the coronal hole. The result is a CME withejecta not well centered within the shock surrounding it. The shock shapeinferred from the imaging is compared with in situ data at 1 AU, where theshock is observed near Earth by the Wind spacecraft, and at STEREO-A. Shocknormals computed from the in situ data are consistent with the shock morphologyinferred from imaging.

A Coronal Hole's Effects on CME Shock Morphology in the Inner Heliosphere