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

Before a volcano erupts, rising magma squeezes out emissions of carbon dioxide visible from space, but trees might be a ...

A new study has identified three states in the US could be hit by an earthquake and mega-tsunami in a handful of years.

Find out which volcanoes in the US are the most active. This article gives clear information about their past eruptions and ...