Scientists are on high alert after threat levels rose for three US volcanoes Thursday, suggesting eruptions may be imminent. The US Geological Survey (USGS) placed Alaska's Great Sitkin on 'Watch ...
Kilauea, one of the most active volcanoes in the world, spewed lava for over 22 hours this week. It's been erupting intermittently since December.
The tallest volcano in Europe, Italy's Mount Etna, and the world's most active volcano, Kilauea in Hawaii, erupting again.