A magnitude 7.O earthquake struck off Russia's Pacific coast this morning about 182 miles (293 km) east northeast off Kuril'sk in the Kuril Islands, the U.S. Geological Survey reported.
The quake, which struck at 0424 GMT, was at a depth of 24.3 miles (38 km), USGS said.
There was no immediate tsunami warning from the quake, according to the Hawaii-based Pacific Tsunami Warning Centre website.
Japan's Meteorological Agency Web site said only a minor tremor was recorded in the northeast of Japan's northern island of Hokkaido, and no risk was seen of a tsunami in Japan.