The Taftan volcano in Iran frequently expels gas, but has not erupted. A volcano that has been dormant for hundreds of thousands of years could be gearing up for a massive explosion, according to new ...

Activity has been detected under a dormant volcano near Sitka, Alaska. Mount Edgecumbe has been inactive for at least 800 years but, following a spate of earthquakes in the area earlier this year, ...

To be considered active, a volcano must have erupted at some point during the Holocene, but dormant and extinct are a little harder to define. When you purchase through links on our site, we may earn ...