The 7.7 magnitude quake caused no reported damage, but was felt in Hokkaido and other northern parts of Japan.
"Everything is calm now. The quake did not cause damage and no one was hurt," the spokeswoman for the Kamchatka regional branch of the emergency services ministry, Olga Mikhailova, told the Reuters news agency.
The quake struck at a depth of just over 300 miles (nearly 500 km) beneath the Sea of Okhotsk at 9.03 p.m.local time between the Kamchatka peninsula and the Pacific Coast island of Sakhalin, a region of major oil and natural gas deposits.