Tsunami warnings are being downgraded in most areas following one of this century’s most powerful earthquakes in Russia.

A powerful earthquake off Russia’s east coast triggered tsunami waves across the Pacific, prompting alerts in Hawaii and California.

A tsunami has hit coastal areas of Russia’s Kuril Islands and Japan’s large northern island of Hokkaido after an 8.7-magnitude earthquake early on Wednesday. Tsunami warning sirens sounded in Honolulu, Hawaii, where people were told to move to higher ground.