Impact cratering both produces new regolith and causes seismic events that can degrade and erase small craters on the surface of asteroids, a paper by Planetary Science Institute Senior Scientist James Richardson says.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/impactsonast.jpg)
Source:
https://phys.org/news/2020-04-impacts-asteroids-regolith-erase-small.html