In terms of large explosions, Yellowstone has experienced three at 2.08, 1.3, and 0.631 million years ago. This comes out to an average of about 725,000 years between eruptions. That being the case, there is still about 100,000 years to go, but this is based on the average of just two numbers, which is meaningless.

Big earthquakes can slosh around the bubbly magma underneath volcanoes hundreds of kilometers away, researchers have found, releasing gases that can increase magma pressure and even lead to an eruption.

Terms in this set (48) Which step in a volcanic eruption occurs just before the volcano erupts? The geologist might find ash, cinders and bombs. A hot spot volcano forms in continental or oceanic crust where magma from the mantle erupts.

The first risk associated with an active volcano, even when it’s not erupting, is the potential for it to erupt at any time. These can be the result of volcanic activity, earthquakes, or even rainfall. So, even when there’s no fire or ash raining from the sky, there’s still an element of danger.

Yes and no. Scientists who specialise in volcanoes are called volcanologists. They are growing more and more confident at predicting when volcanoes will erupt in the short-term. They use monitors to detect movement in the rocks that make up the volcano and in the earth’s crust.

Which volcanic eruptions were the deadliest?