"A magnitude 5.9 earthquake was registered at 14:22 Saturday [03:22 GMT] near the Kuril Islands", head of the Yuzhno-Sakhalinsk seismic station Elena Semenova said.
The epicentre of the aftershocks was located at 41.9 degrees north latitude and 147.0 degrees east longitude, some 160 miles southeast of Yuzhno-Kurilsk, a regional centre on Kunashir Island, at a depth of 23 miles, she added.
READ MORE: Magnitude 5.6 Earthquake Hits Kuril Islands — EMSC
Yuzhno-Kurilsk's residents felt magnitude 3-4 tremors, while the village of Malokurilskoye on Shikotan Island experienced magnitude 3 tremors, Semenova said.
According to Sakhalin Region's emergency services, there were no casualties, injuries, or damage caused by the earthquake. No tsunami alert was made.
The Kuril Islands are located in a seismically active region known as the Ring of Fire, which is constantly affected by powerful earthquakes.
