Tsunami waves reached Hawaii and the West Coast after one of the strongest earthquakes in recorded history, a magnitude 8.8 temblor, struck off Russia's Kamchatka Peninsula on July 29 before most of the warnings were downgraded hours later.

A massive earthquake off the coast of Kamchatka, Russia has triggered a series of tsunami alerts for Hawaii, Alaska, and the U.S. West coast. The earthquake was measured at an 8.7 on the Richter scale according to the U.

One of the most powerful earthquakes in decades has struck Russia's far east, causing 5m tsunami waves and prompting evacuations from Japan to Hawaii.