Impacts on Asteroids Produce Regolith, Erase Small Craters

A shaded-relief map of a surface cratering simulation of near-Earth asteroid 433 Eros, color-coded according to surface elevation (blue = -125 meters, pink = +125 meters). The surface is shown after 400 million years of exposure to the Main Asteroid Belt, where Eros spent most of its lifetime. (Credit: James Richardson)

TUCSON (PSI PR) — 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.