A 7.2-magnitude quake hit the Kuril Islands in Russia on Wednesday, prompting residents to seek higher ground due to a brief tsunami threat, the authorities said.
The Russian emergency ministry said the quake's epicenter is 210 kilometers southeast of Severo-Kurilsk, a city of around 2,500 on the Kurile island of Paramushir.
Officials reported no casualties or damage, but said 400 residents of Severo-Kurilsk were raised to a higher level.
The emergency department said a small tsunami wave about 50 centimeters high hit the shore.
For its part, the US Geological Survey estimated the magnitude of the quake at 7.5.
The quake occurred at a depth of 59 kilometers, around 1,400 kilometers northeast of the Japanese city of Sapporo, USGS added.
The Pacific Tsunami Warning Center said "only very small tsunami waves have been generated by this earthquake and there is no further threat".
The four southernmost islands of the Kuril chain have been controversial between Moscow and Tokyo since the end of the Second World War.
The Kuril Islands are known as Northern Territories in Japan.
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