HiRISE has been re-imaging regions first photographed in 2006 through 2007, which at the time we acquired this observation in 2018, was six Mars years prior. This long baseline allows us to see large, rare changes as well as many smaller changes.

One of the most actively changing areas on Mars are the steep edges of the North Polar layered deposits. This image shows many new ice blocks compared to an earlier image in December 2006. An animation shows one example, where a section of ice cliff collapsed. The older image (acquired in bin-2 mode) is not as sharp as the newer one.

ID: ESP_054663_2650
date: 25 March 2018
altitude: 319 km

https://uahirise.org/hipod/ESP_054663_2650
NASA/JPL-Caltech/UArizona
#Mars #science #NASA