What triggers geysers to go off is still not well understood. A new paper shows that one small earthquake likely triggered an eruption of the world's tallest active geyser, Steamboat.
Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years. Lava-viewers enjoyed the rare marvel of being able to see Kilauea erupting at the same time.
The eruption severed Tonga's single fiber-optic cable, rendering the Pacific archipelago offline and unable to communicate with the rest of the world. Flights brought bottled water and other supplies.
Despite the eruption on the Canary island that has sent thousands fleeing, including some 500 tourists, Spain's tourism minister said visitors should stay and "enjoy what nature has brought us."
The volcano on Hawaii's Big Island began erupting more than a week ago and lava continues to flow, creating a huge new lake that's taken the place of a water lake it vaporized.
Mount Sinabung was dormant for 400 years before reawakening in 2010. Since then, it has erupted repeatedly. Dramatic photos and videos capture the latest eruption.
