Update: A tsunami warning was issued for Northeast Japan following a 7.1 magnitude earthquake off the coast late Thursday, but later retracted.
The warning was retracted after 80 minutes, but the aftershock, which is the largest since last month’s massive quake, caused gas leaks and fires and left some in the city of Sendai without electricity, according to Japanese broadcaster NHK.
Workers were evacuated from the Fukushima Daiichi nuclear plant but no damage was reported, according to CNN.
Thursday’s quake, which was 25 miles under the water off the coast of Miyagi Prefecture, shook buildings as far away as Tokyo.
The U.S. Geological Survey said that the quake struck off the eastern coast 60 miles from Sendai and 90 miles from Fukushima. The northeast coast was ravaged by a tsunami last month caused by a 9.0 magnitude quake.