An 8.8-magnitude earthquake, one of the largest in the past century, struck off the coast of Russia this week, prompting tsunami warnings worldwide.

The National Tsunami Warning Center issued a tsunami warning for parts of Alaska’s Aleutian Islands, and a watch for portions of the West Coast, including California, Oregon, Washington and

Oregon, Washington, and California are under a tsunami watch after an 8.7 magnitude earthquake struck off the coast of Russia.