When a large volcano erupts, as Mount Spurr appears close to doing about 80 miles from Anchorage, Alaska, it can ...

When a large volcano erupts, as Mount Spurr appears close to doing about 80 miles from Anchorage, Alaska, it can release enormous volumes of ash. Fine ash can infiltrate the lungs of people and ...

Mount Etna in Sicily, Italy, is an example of a composite volcano ... Hot gas, ash and rock mixed together to make a deadly cloud that flows down the side of the volcano. It’s not all bad.

Located on the east coast of the Italian island of Sicily, Mount Etna is the world's most active volcano. Chances are it's ...