The Canary Islands not only boast the third largest volcano in the world, but also the largest natural underwater lava tunnel ... formed in the volcanic rock. Some say that the "Green" refers ...

What we see as Isle Royale and the Keweenaw Peninsula is actually part of the one of the largest known lava flows on Earth. A map of the different forms of rock found throughout the Greenstone Flow.

Centuries of eruptions on the Big Island have created hidden networks of passages beneath volcanoes. In December 2016 a large lava delta formed by Kilauea volcano sank into the sea, exposing the ...

The latest incident started at about 10:16 a.m. when the vents began pouring the molten rock onto the floor of Halemaumau Crater, according to CBS News. A half-hour later, lava burst out of a vent ...

People in Hawaii are asking if anything can be done to stop or divert the flow of lava as molten rock from Mauna Loa ... Hawaii's Mauna Loa, the world's largest active volcano, has started to ...