The European Space Agency (ESA) has published an intriguing image taken by the Trace Gas Orbiter. It shows distinctive black “scratches” on the Martian surface. These were formed by a meteorite impact.

Dark streaks on Mars caused by a meteorite impact.
Source: ESA/TGO/CaSSIS

According to scientists, these stripes were formed when a meteorite struck the edge of Mount Apollo, an ancient volcano located in the southern Hemisphere of Mars. The image shows a faint cluster of impact craters in a discolored area at the base. The impact caused more than a hundred dust avalanches to descend the mountain slope.

Similar dark streaks can be found in many regions of Mars. Scientists believe they are formed when layers of fine dust suddenly slide down steep slopes. Having found no traces of water, they concluded that these formations were mainly the result of dry processes caused by wind and dust.

The results of a recent study published in the journal Nature Communications suggest that most of them are not related to meteorites: less than one in a thousand streaks were formed by rocks falling on Mars. In most cases, seasonal changes and wind causing dust to rise are to blame.

“The dynamics of dust, wind, and sand appear to be the main seasonal factors influencing the formation of stripes on slopes. Meteorite impacts and earthquakes are locally significant but relatively insignificant factors on a global scale,” explains lead author Valentin Bickel from the University of Bern in Switzerland.

Valentin used deep learning algorithms to analyze more than two million streaks on slopes in images taken by the MRO spacecraft. As a result, the census of streaks made it possible to determine their location in five separate “hot spots” on Mars between 2006 and 2024.

“These observations can help us better understand what is happening on Mars today. Obtaining long-term, continuous, and global observations that reveal the dynamics of Mars is a key task for current and future orbiters,” says Colin Wilson, ESA scientist for the Trace Gas Orbiter project.

Trace Gas Orbiter continues to photograph Mars from orbit in order to understand its ancient past and potential suitability for life. The spacecraft regularly takes images of the surface, and its data has made it possible to identify areas of the Red Planet that are rich in water ice.

Earlier, we reported on how carbon dioxide ice “dug” ravines on Mars.