Is there a volcano under Yellowstone park?

Answer:
Technically Yellowstone is a volcano, below it as well as the surface, it just isn't actively spewing lava or ash. The Yellowstone caldera is 34 miles by 45 miles making it one of the worlds six super volcanos.
Contributor: Daryl-HUnter
First answer by Daryl-HUnter. Last edit by Daryl-HUnter. Contributor trust: 2 [recommend contributor recommended]. Question popularity: 3 [recommend question].