ATHENS, Greece -- Multiple earthquakes are rattling Santorini, a volcanic island in Greece, prompting authorities to dispatch rescuers with tents, a sniffer dog and drones, and to shut schools on four ...

Below Mount Jefferson and McKenzie Pass is a massive storehouse of water three times the size of Lake Mead, say Oregon ...

A stunning composite image, made up of three years' worth of satellite photos, shows the ancient lava of Libya's Haruj ...

The chemical makeup of mineral inclusions preserved in impact glass hints at the site of a missing impact crater.

Yellowstone's magma system shows new activity, with the northeast sector possibly hosting future volcanic activity.

North of the California border, scientists just found 21 trillion gallons of water hiding in the cracks of volcanic rock.

Disaster response units deployed as tremors of up to magnitude four rock popular holiday destination every few minutes ...

The Chief Scientist of the Yellowstone Volcano Observatory, Dr. Michael Poland, says he's not worried about an imminent eruption of the volcano under Yellowstone National Park.

Firefighters said the canyon was filled with flames Friday night. Then, when the rain came down on Saturday and Sunday, it ...

The strongest earthquake recorded was magnitude 4.6 at 3:55 p.m. Sunday, at a depth of 14 kilometers (9 miles), the Athens ...