An earthquake of magnitude 7.1 struck near the east coast of Russia's Kamchatka region on Saturday, the German Research Centre for Geosciences (GFZ) said.
According to GFZ, the quake was at a depth 10 kilometres.
The United States Geological Survey (USGS) pegged the magnitude at 7.4, with a depth of 39.5 km.
The Pacific Tsunami Warning System said there was a threat of a tsunami.
In Japan, to the southwest of the Kamchatka Peninsula, no tsunami warning has been issued, broadcaster NHK reported, citing the Japan Meteorological Agency.

Israeli strikes kill two in Gaza, destroy medicine storage warehouses
All 10 climbers confirmed killed in Pakistan avalanche
Russia pounds Kyiv with missiles, killing at least ten
Trump says deal reached to disarm Hamas, Israeli support for plan remains uncertain
