Could a nuclear explosion on Yellowstone cause it to errupt?

If it was detonated just above ground level, it might trigger an eruption. It would depend on the present configurations of faults around the hot spot, and the depth to the main magma chamber. read more

There could be an eruption if magma is already in the vent, near the mouth of the volcano, and only needs a small amount of pressure to trigger an eruption. But the real destruction happens when the bomb is suddenly transported into the magma chamber, between one to 10 kilometers (0.6 to 6.2 miles) underground. read more

The weight of the snow causes the hollow space in the chamber to cave in and start the eruption. The supereruptions are driven from within, not from without. A nuclear explosion in a mine might prevent a supereruption by releasing the pressure more gradually instead of all at once. read more