Other contributors have said "Hawaii's most recent volcano eruptions?" is the same question as "When was Hawaii's most recent volcanic eruption?" If you believe that these are not asking the same thing and should be answered differently, click here
There are 169 active volcanoes in the US. -Don't be scared, be prepared! The USGS continuously monitors many of them with webcams.The one at Kilauea is pretty neat! Please access the related link...