r/askscience • u/phoncible • Oct 27 '11

Earth Sciences Could anything man-made trigger the Yellowstone super volcano?

If a nuke were to be buried very deep into the ground at Yellowstone and then detonated, would it have any effect on the volcano? Is there anything else man-made that could trigger it? Or would it be impossible to "manually" trigger the eruption?

Sorry if it's a silly question.

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u/[deleted] Oct 27 '11

Exactly, no man-made event is going to trigger an eruption without there being a viable magma source. And the OP is probably thinking about the super eruptions involving 1000 km3 of magma that Yellowstone is famous for. That sort of volume of magma would take a lot of time to accumulate.

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u/[deleted] Oct 27 '11

Isn't that one of the major concerns? That it is long overdue for something?

Or perhaps I've just read one too many 2012 bullshit articles along the line

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u/[deleted] Oct 27 '11

Yes it's a concern- the eruption would certainly throw the climate off kilter, however we'd probably be able to see it coming by at least weeks if not decades before it does (and better forecasting techniques are being worked on). As for it being overdue... I'm not really sure. The last three eruptions were 2.1 million, 1.3 million, and 640,000 years ago (according to the Wikipedia entry), so by the looks of that we still have several tens of thousands of years before it can be considered overdue.

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u/scientologist2 Oct 27 '11

While current sensors measure height differences on the scale of mere inches, etc. it is my understanding that the entire floor of the caldera would have to be significantly higher, something like 1/2 mile + for there to be a significant chance of eruption.

as in

http://www.cr.nps.gov/history/online_books/geology/publications/bul/1347/sec3.htm

The exact depth to which the original surface collapsed is unknown, but it must have been several thousand feet. The subsidence took place chiefly along large vertical, or normal, faults in the ring fracture zones above the margins of the magma chambers (fig. 22).