Trough Exiting Sulci Gordii
HiRISE PICTURE OF THE DAY: 24 JUNE 2025

Leaving Sulci

This image was requested to get more coverage of existing imagery at this location that shows a trough exiting Sulci Gordii. This transition may be of interest, helping to understand the nature of the trough. Sulci Gordii are a grouping of ridges —almost like small, rocky mountains—located east of the giant volcano, Olympus Mons.



HiRISE Instrument News
Since July 23, 2023, HiRISE observations have lacked data from the RED4 CCD due to a hardware issue, creating a gap in the middle of image products and reducing the color swath to 1 CCD width. We are investigating the hardware issue and may be able to acquire some RED4 data in the future.

Circular Sand Dunes
Sand dunes of many shapes and sizes are common on Mars. In this example the dunes are almost perfectly circular, which is unusual.