A major U.S. city is under threat from a potential volcanic eruption after more than 20 earthquakes were recorded in Alaska.

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

While the likelihood of an eruption without additional warning is currently low, the volcano poses hazards for recreators on Mount Spurr. That is due to elevated carbon and sulfur dioxide levels ...

Mount Spurr has seen increased ... This would have major effects on global aviation, as well as for the local area. In 2010, the eruption of Eyjafjallajökull volcano in Iceland caused the ...