This is the location with the most impressive known gully activity in the Northern hemisphere. Gullies are active in the winter due to carbon dioxide frost, but northern winters are shorter and warmer than southern winters, so there is less frost and less gully activity.
Written by: Alfred McEwen (audio: Tre Gibbs) (18 April 2017)
More info and image formats at http://hirise.lpl.arizona.edu/ESP_049083_2320
Image: NASA/JPL/University of Arizona