The cap allows those bubbles to rise upward before being transferred out of the system. Yellowstone’s iconic hydrothermal features are known to emit gases found within magma, like that below ...

And we can see this few hundred foot thick cap to the Yellowstone magma reservoir that's over 2 miles deep. I think that says a lot about our ability to see into the Earth.

A seismic survey reveals a magma cap 2.5 miles under Yellowstone, acting as a pressure-release lid and reducing the risk of a super volcano eruption.

A seismic survey reveals a magma cap 2.5 miles under Yellowstone, acting as a pressure-release lid and reducing the risk of a super volcano eruption.

And by finding a defined magma cap, researchers have also been able to determine that Yellowstone’s system remains lively and dynamic. “It hasn’t just been sitting there without any recharge ...

A seismic survey reveals a magma cap 2.5 miles under Yellowstone, acting as a pressure-release lid and reducing the risk of a super volcano eruption.

A seismic survey reveals a magma cap 2.5 miles under Yellowstone, acting as a pressure-release lid and reducing the risk of a super volcano eruption.

A seismic survey reveals a magma cap 2.5 miles under Yellowstone, acting as a pressure-release lid and reducing the risk of a super volcano eruption.

A seismic survey reveals a magma cap 2.5 miles under Yellowstone, acting as a pressure-release lid and reducing the risk of a super volcano eruption.