An explosion on Mount Spurr could generate massive cloud of ash, which could mess with airplanes and cause issues for humans.

The Axial Seamount is one of the most active but least well-known volcanoes in the Pacific and all signs point to it erupting very soon—for the first time in a decade.

One of the Pacific Ocean’s lesser-known volcanoes will blow its vent in the coming months, causing 10,000 earthquakes in one day. Here’s what scientists are saying.