A massive earthquake has struck off the coast of Kamchatka, prompting tsunami warnings from Hawaii to Alaska to California.

The earthquake was recorded at about 78 miles east-southeast of of Petropavlovsk-Kamchatsky, Russia, according to the U.S. Geological Survey.

An extremely large 8.8 magnitude earthquake struck off the coast of Russia on Tuesday night, prompting Tsunami warnings in ...

Tsunami watches are an advance notice to areas that could be impacted by a tsunami at a later time. Watch areas may be upgraded to a warning or advisory status, or canceled, based on new information.

A tsunami watch is now in effect which includes the coastal areas of California, Oregon, Washington, British Columbia and ...