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 garden features an unusual mixture of water that supports theses octopus mothers in hatching their babies in less than two years.

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 ...

LOS ANGELES — 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 ...

An undersea volcano erupted near the island nation of Tonga, prompting a tsunami advisory for California, Oregon, Washington and Hawaii.

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.