Yellowstone is what’s called a hotspot, where large areas of molten material stay in one place as the Earth’s tectonic plates move around. This type of magma is called “basaltic”, and it ...

Yellowstone's magma system shows new activity, with the northeast sector possibly hosting future volcanic activity.

That movement has now left one pool of molten material on the west of the caldera disconnected from any heat sources, which will likely allow it to cool. Meanwhile, the largest pool of near-surface ...