Bright Patches in Terra Sirenum
HiRISE PICTURE OF THE DAY: 16 JULY 2025
Bright Patches in Terra Sirenum

This observation is a good example of when different missions work together: the CaSSIS instrument on the ExoMars Trace Gas Orbiter identified here 10-meter scale bright patches on irregular collapse feature rims. An example of a location with possible mud volcanism? An image at HiRISE resolution can help to answer that question.



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.

Icy Cliffs at the Martian North Pole
In the spring, we also sometimes see avalanches pouring down these cliff faces and this image was taken to search for more of them.