A seamount in the northwestern Pacific Ocean may be the largest volcano on Earth, and could rival the largest in the solar system -- the mighty Olympus Mons on Mars -- according to oceanographers.

Molten rock from Kilauea volcano poured into the ocean, creating a toxic steam cloud formed by a chemical reaction when lava touches seawater. Latest U.S.

Researchers have discovered the first evidence of a volcano under the ice in West Antarctica -- a mountain that erupted about 2,300 years ago and may still be generating enough heat to speed ...

An underwater volcano off the Pacific Coast could erupt by the end of the year, according to scientists. The volcano, known as Axial Seamount, is more than 4,900 feet beneath the Pacific Ocean and … ...

From the Los Angeles County fires to the Caribbean earthquake, the year has been off to a difficult start. Now, more than one volcano is spewing lava, one of which is in the United States.

Ocean temperatures reached record-breaking highs for the month of May, the National Oceanic and Atmospheric Administration announced. 24/7 Live Los Angeles Orange County Inland Empire Ventura ...