A massive 7.1 magnitude earthquake struck off the eastern coast of Russia’s Kamchatka Peninsula, according to the German Research Centre for Geosciences (GFZ). The quake’s epicenter was 10 kilometers (6.2 miles) beneath the surface. However, the U.S. Geological Survey reported a slightly stronger magnitude of 7.4 and placed the depth at 39.5 kilometers (24.5 miles). The Pacific Tsunami Warning Center has warned of a possible tsunami threat, though no alerts have been issued for Japan, located southwest of Kamchatka.