The US Geological Survey and the Japan Meteorological Agency reported that a 6.1-magnitude earthquake occurred off the northern Japanese island of Hokkaido on Saturday night.
The offshore tremor that affected the coastal cities of Kushiro and Nemuro was followed by no tsunami warning.
No early reports of damage or injuries were published by major Japanese media sites.
The USGS reported that the earthquake occurred at 10:27 pm (13:27 GMT) at a depth of about 43 kilometres (27 miles).
An expert on NHK’s public channel cautioned locals to be on the lookout for earthquakes for the next week.
Japan is located on the Pacific “Ring of Fire,” an area of extremely active seismic activity that extends from Southeast Asia and into the Pacific Ocean. As a result, earthquakes there are frequent.
The nation conducts regular drills to get ready for a huge jolt and has strict building codes to make sure that structures can withstand powerful earthquakes.
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