Why are there no impact craters on the surface of Io?
a. Io did have impact craters but they have all been buried in lava flows. Io does have a few impact craters. “…Q: Are there any impact craters on Io like the other moons of Jupiter or have they all been wiped clean by Io’s volcanoes? A: Yes there are impact craters on Io but they are VERY rare. In all my time of looking at images of Io, I have only seen 1 bonafide impact crater on Io, and that was on a mountain. Check out my page on this crater for more info. Craters on Io are covered by lava almost as soon as they form. …” http://members.fortunecity.