Scientists say a mammoth magma reservoir lies under Yellowstone. It’s four times the size of the magma pool that fuels the super volcano. They say it holds enough hot rock to fill the Grand Canyon 11 times… but you shouldn’t worry.
Dr. Robert Smith is considered the world’s foremost expert on the Yellowstone super volcano system. His publication last year drew attention worldwide, when it declared the magma body under the park was two and a half times larger than previously thought.