The Yellowstone supervolcano is a vast reservoir of magma ... Drilling into the top of the magma chamber 'would be very risky;' however, carefully drilling from the lower sides could work.

The volcano's magma chamber between 5 and 10 miles under the surface heats the underground water that bubbles up as the park's famous hydrothermal features. Only between 10% and 30% of the chamber ...

When Yellowstone's roads open to car traffic ... years and no major eruption for 631,000 years, however.The volcano's magma chamber between 5 and 10 miles under the surface heats the underground ...