The international space station silhouetted by the moon

@ajhedges: No??
@aeacus: Yes, calderas are formed by volcanic explosion or collapse. It's an unlikely stretch, but there's no point in not considering all options.

But the moon is solid rock all the way through, a volcanic eruption would be impossible. Pretty sure there are only craters from crater impacts on the moon.

wolfballoonsquad is right in that the moon does have volcanism but that crater is not one of the Moon's volcanoes

The moon does not have volcanoes

http://volcano.oregonstate.edu/oldroot/volcanoes/planet_volcano/lunar/Overview.html
http://www.sciencemag.org/news/2014/10/recent-volcanic-eruptions-moon
https://science.nasa.gov/science-news/science-at-nasa/2014/24nov_imps
Most places seem to disagree with you about the Moon's volcanism

"No more than 100 million years old."

sooo that means there isn't any volcanic activity?

I interpreted it as there are no more volcanoes now

nope, it says that there is evidence of volcanic activity within the last 100 million years