A massive magnitude 8.8 earthquake struck off the coast of Russia Tuesday, sparking tsunami warnings in Alaska and Hawaii and alerts for other areas of the West Coast.
The earthquake occurred about 85 miles off the east coast of Russia's Kamchatka Peninsula with a depth of nearly 12 miles, according to the U.S. Geological Survey. The agency upgraded the earthquake's reported magnitude from initial reports of 8.0 and 8.7.
Magnitude 6.3 and 6.9 aftershocks were also reported in the area, according to USGS.
A tsunami warning was announced for Alaska's Aleutian Islands and Hawaii. California, Oregon and Washington are under a tsunami advisory, while the threat is being evaluated.