These mountains are sculpted when an underwater volcano explodes, spewing hot plumes from the mantle in pipe-like upwellings.

A deep-sea exploration off the coast of Hawaii has revealed a striking natural formation on the Pacific seafloor that’s left ...

Indonesia's most active volcano erupted again on Saturday, spewing a column of volcanic ash up to 1,000 meters (3,280 feet) ...

NOAA explorers discovered a massive underwater mountain near Palau using sonar mapping during ocean exploration cruise.

American Samoa is a United States territory which comprises the easternmost islands of a volcanic island chain formed by the ...

“Underwater volcanoes during Snowball Earth played a crucial role” in the transformation of our world from frozen ice-planet ...

In the dark off Vancouver Island, a restless seamount may be rewriting the rules of reproduction. A touch of volcanic warmth ...

NASA’s GUARDIAN system detect a tsunami from space, giving coastal communities faster warnings and more time to respond.

Using geochemistry, radioactive dating and computer modeling to map particles’ trajectories, the scientists linked the 1831 eruption to an island volcano in the northwest Pacific Ocean, they reported ...

A 7.8 magnitude undersea earthquake near Russia caused a tsunami scare. Here's why we fear the destructive waves ...