A massive 8.0 earthquake near Russia's Kamchatka Peninsula has triggered tsunami alerts in Hawaii, Alaska, Japan, and Russia. Hawaii is under a tsunami watch, while Alaska's Aleutian Islands are under an advisory.

A magnitude-8.7 earthquake in Russia’s Far East early Wednesday prompted tsunami warnings in parts of Japan, Alaska and Hawaii.

One of the strongest earthquakes ever recorded struck Russia's Far East early Wednesday, sending tsunami waves into Japan and Hawaii and across the Pacific.