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A magnitude 6.8 earthquake hit near Nagano City, causing at least 20 injuries due to collapsing homes.
According to the Mainichi Shimbun:
TOKYO (Kyodo) -- A strong earthquake with a preliminary magnitude of 6.8 hit Nagano Prefecture and surrounding areas in central Japan on Saturday night, the weather agency said.
No tsunami warning was issued.
The 10:08 p.m. quake measured lower 6 on the Japanese seismic scale of 7 in northern Nagano, and lower 5 in Niigata Prefecture, the Japan Meteorological Agency said.
An aftershock registered lower 5 in northern Nagano at 10:37 p.m., according to the agency.
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