The Amboy Crater is a volcanic maar, not a volcano. Maars are formed by explosive eruptions caused by the interaction of magma and groundwater. While they can erupt, they don't typically have the same kind of sustained eruptions as volcanoes.

The Amboy Crater hasn't erupted in recorded history. It is believed to have last erupted tens of thousands of years ago, possibly during the Pleistocene Epoch.

It's important to note that while the Amboy Crater is considered dormant, it's still possible for it to erupt again in the future. However, the likelihood of an eruption in the near future is very low.