Great news: Yellowstone super-volcano much bigger than thought

Great news: Yellowstone super-volcano much bigger than thought

[Ed. – Hey, we’re number one.]

The world’s authority on Yellowstone’s Super Volcano says it’s more than twice as big as scientists once thought. Does that mean it’s more likely to blow up soon? Penny Preston found Dr. Robert Smith at his home near Grand Teton, and found the answer. …

“Anytime you come to Yellowstone you have to drive uphill. And the reason is this giant plume of magma, is very hot, therefore it’s bullient, low density and it just lifts the surface up. …

“And these giant eruptions, supervolcanos if you wish, probably last many, many months, maybe even years.” …

Smith and his students use siesmographs to map the magma pool underneath Yellowstone’s volcano, and satellites to determine how much the land swells or bulges. They found that the magma is, “2.5 times larger than we had originally imaged.”

The magma movement is signaled by earthquakes. Smith mentioned the 4.8 magnitude Norris area earthquake that damaged Lake Hotel last spring.

He explained, “It’s the biggest earthquake in 30 years.”

So, how likely is it that the big one will blow soon?

“If we were to have another big eruption, it would affect a large area, on the order of several states. But, as I said, that probability is very, very, very, very small. In my calculations it’s point zero, zero, zero, one percent.”

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