Two large meteor impacts on Mars triggered significant seismic activity in 2021
In short: Researchers using orbital imagery and seismic data found that two large impact craters formed on Mars during the latter half of 2021. These craters, both larger than 130 meters in diameter, represent the largest fresh impacts discovered by the Mars Reconnaissance Orbiter since it began operations 16 years ago.
The events were significant enough to produce two of the largest seismic shocks recorded by the InSight lander during its three-year mission, both exceeding magnitude 4. By combining orbital photos with ground motion data, scientists can study how energy from these impacts moved through the Martian atmosphere and subsurface.
One specific impact at 35°N latitude is particularly notable because it excavated blocks of water ice. This provides a rare opportunity to test deep-interior seismic models using known distances. However, the study relies on data from two specific events rather than a long-term survey of all Martian impacts.
Why it matters: Combining orbital and seismic data allows scientists to 'see' inside a planet by tracking how impact energy travels.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Source: Research: Posiolova et al. (2022). Largest recent impact craters on Mars: Orbital imaging and surface seismic co-investigation. Science. · other-oa
To cite this card, link to https://intellectplus.co.uk/app/space-research-two-large-meteor-impacts-on-mars-triggered-significant-seism.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Planetary science · More in Space · Latest · A–Z · All topics
