The world's biggest earthquake in 14 years has plunged Japan, Russia and the entire west coast of America into tsunami watch and sparked fears for millions.

The quake reached a magnitude of 8.8 and struck about 84 miles east-southeast of Kamchatska. off the coast of Russia, about 7.24pm EST.

It is the largest earthquake to hit since 2011, when a 9.1 megaquake hit northeast Japan and left 19,747 people either dead or missing.

Tsunami waves hit both Japan and Russia on Sunday evening while millions of Americans across Hawaii, Guam, California, Washington and Oregon are under various levels of warnings.

This is a developing story. Follow Daily Mail's live coverage below.