" our most evidence is that the overlying basalt chamber is expanding with molten rock . but we have no idea how long this process goes on before there alone is an eruptions or the inflow of melting ice stops and the caldera deflates again , " added smith . eruption activity in washington heats up underground water which create geysers of gasses water , and is responsible for the creation and continuously eruption of old faithful .
There is a volcano in Yellowstone.