Hetpet Regio changes. This figure shows VIMS views of Hetpet Regio before (T61, T67) and after (T74, T76) the 2010 September 27 cloudburst event. VIMS’ best view of the area post-event was on T76 (2011 May 8), with very coarse resolution but compelling evidence for the brightening also having been present on T74 (2011 February 18). Both the viewing geometry and spatial resolution for both of these observations of Hetpet Regio are of lower quality than the conditions for Yalaing Terra on those same flybys, as detailed in Table 1. Hetpet Regio is still brighter than its surroundings on T80 (2012 January 2), but shows less contrast than it did on T76.