Cosmic Rays on Mars -NASA Curiosity RAW image anomaly Sol 2856

 odd form

Sol 2856: Right Navigation Camera

This image was taken by NAV_RIGHT_B onboard NASA's Mars rover Curiosity on Sol 2856 (2020-08-18T15:02:52.000Z) Image Credit: NASA/JPL-Caltech

enlarged:

a few enlarged and sharpened images of the anomaly located on left middle of original image:

a few enlarged and sharpened images

energized subterranean gas? cosmic rays?

https://mars.nasa.gov/raw_images/838744/