A tsunami warning issued for Hawaii after one of the strongest earthquakes ever recorded, an 8.8 magnitude in Russia's Far East, was downgraded to an advisory after small waves peaked.

A powerful 8.8-magnitude underwater earthquake off the eastern coast of Russia has triggered a tsunami that slammed into Hawaii and

Hours after a massive 8.8 magnitude earthquake struck near the Russian coast, becoming one of the strongest tremors ever recorded, tsunami waves arrived in Hawaii and the U.S. West Coast following efforts to get hundreds of thousands away from coastlines and to higher ground.