The Pacific Tsunami Warning Center has issued a threat forecast for Russia's Kamchatka Peninsula after two quakes — the larger with a magnitude of 7.4 — struck in the sea nearby on Sunday. The larger quake was at a depth of 20 kilometers (12 miles) and was 144 kilometers (89 miles) east of the city of Petropavlovsk-Kamchatsky, which has a population of 180,000, according to the U.S. Geological Survey. A few minutes earlier, a quake with a magnitude of 6.7 was recorded nearby.