Alaska, largely unspoiled wilderness, looks like something out of The Lord of the Rings.

Mount Spurr in Alaska – rising some 3,370 meters or 11,070 feet above sea level  – could be about to erupt, with the number ...

The striking Kawah Ijen volcano in Indonesia is known for emitting what appears to be blue lava as soon as the sun sets.

A truly remarkable quirk of the natural world - this volcano lights up the night sky in an iridescent blue when its sulphuric gases make contact with the air.

A swarm of more than 100 shallow earthquakes at Alaska's Mount Spurr that began Sunday night and ran to Monday morning ...

the appearance of a new lake at the summit or fumaroles, which are fissures, cracks or holes in the mountain releasing volcanic gases and steam. The one warning sign that hasn't come yet is ...