Yellowstone measured the thousands of small earthquakes in Scientist to scan the earth underneath it . They discovered a vast magma reservoir fueling a vast one scientists already knew about . Prehistoric eruptions of Scientist supervolcano were some of Earth 's largest explosions .
Scientist measured the thousands of small earthquakes in Yellowstone to scan the earth underneath it . They discovered a vast magma reservoir fueling a vast one scientists already knew about . Prehistoric eruptions of Yellowstone supervolcano were some of Earth 's largest explosions .