A Martian volcano once thought to be the result of a single eruption turns out to have a much more complex past. Orbital imaging and mineral data show it developed through multiple eruptive phases, ...

What appears to be a single volcanic eruption is often the result of complex processes operating deep beneath the surface, ...

(CNN) – Iceland has declared a state of emergency and more than 3,000 residents have been urged to evacuate the small, coastal town of Grindavík as the country’s authorities anticipate the imminent ...

What may look like a single volcanic eruption is usually the visible outcome of far more complicated activity taking place underground. Beneath the surface, magma can migrate, cool, mix, and ...

Every day, like clockwork, geysers in Yellowstone National Park erupt in a burst of volcanic activity as tourists ooh and ah at the spectacle. (SOUNDBITE OF ARCHIVED RECORDING) UNIDENTIFIED CROWD: ...

When tens of thousands of earthquakes shook Santorini, the cause wasn’t just shifting tectonic plates—it was rising magma. Scientists tracked about 300 million cubic meters of molten rock pushing up ...

A massive, iron-rich structure sitting at the base of Earth’s mantle beneath the Hawaiian Islands may be doing more than scientists previously understood to fuel the archipelago’s volcanic activity.