Investigating the Origins and Heliospheric Evolution of Homologous CMEs Originating from NOAA AR11093 on 7 and 14 August 2010

The relative positions of STEREO, SDO and Venus Express in August 2010 provide an opportunity for unique multi-spacecraft observations of homologous CMEs. On 7 August 2010, a halo CME originating from NOAA AR11093 is observed remotely by STEREO B. Seven days later this active region erupts again, and a halo CME is observed remotely by STEREO A on 14 August 2010. We show that both eruptions are associated with reverse S-shaped flux rope structures and display a number of typical large-scale features related to CMEs, including coronal dimmings and EUV waves. By combining remote sensing and textit{in situ} observations of the ejecta, we consider the structure and heliospheric evolution of these CMEs and their interplanetary counterparts. Next, we compare and contrast these two eruptions, with a view to discussing the implications of the similarities and differences between the ejecta.