MIcroscopic crystals of volcanic ash are revealing surprising clues about the world's most devastating eruptions
A slide show of eruptions and their impacts around the world
Mount St. Helens may be patching in its 1980 crater
Quantum-cascade laser may detect impending eruptions
Volcanoes swell and collapse back down in what seem like great, heaving sighs. These movements may help scientists better predict eruptions
It's been nearly 25 years since Mauna Loa, Hawaii's most dangerous volcano, last erupted—but researchers warn that another eruption may be on the horizon.
When Mount Pinatubo erupted in 1991 it left a trail of evidence in the skies that is helping scientists decipher the workings of the global climate
Some GOPers mock funding of volcano observation programs, but an expert says volcanoes are potentially deadly and should be watched, lest they blow their tops
An undersea volcano in the South Pacific is spewing stunning columns of smoke, steam and ash thousands of feet into the air. The eruption began Monday after a series of earthquakes near Tonga, a 170-island archipelago between Australia and Tahiti, residents told the Associated Press.