" our best evidence is that the crustal lava chamber is filling with liquid rock . but we have no idea so much this process goes on before there either is an eruption or the remittance of molten ice stop and the volcanic deflates again , " added johnson . volcanic activity in yellowstone powers up underground groundwater thereby create geysers of superheated water , and is responsible for the creation and continual explosions of long faithful .
There is a volcano in Yellowstone.