A mysterious and highly active undersea volcano off the Pacific Coast could erupt by the end of this year, scientists say. Nearly a mile deep and about 700 miles northwest of San Francisco, the ...

The undersea volcano has been attracting attention for months as scientists prepare for an eruption they expect sometime in 2025. But because the top of the volcano is 4,500 feet below the ocean ...

Authorities in Southern California closed beaches and piers as a precaution. The Hunga Tonga Hunga Ha’apai volcano is located about 40 miles north of Tonga's capital.

Despite being rare, tsunamis represent one of the most powerful and unpredictable natural forces affecting the United States.

Russia's towering Klyuchevskoy Volcano has erupted following a massive 8.8 magnitude earthquake that rocked the Kamchatka ...