The epicenter of the quake was off the coast of Fukushima Prefecture, the site of a massive earthquake and tsunami in 2011 that killed thousands and caused meltdowns at a nuclear plant.
TOKYO — A large earthquake shook a broad area across eastern Japan late Saturday night, with its epicenter off the coast of Fukushima, near where three nuclear reactors melted down after a quake and tsunami nearly 10 years ago.
The Japanese weather service reported the quake’s preliminary magnitude as 7.1, but said there was no danger of a tsunami.
Coming a little less than a month before the 10th anniversary of what is known as the Great East Japan earthquake, the quake rattled the greater Tokyo area for about 30 seconds starting at 11:08 p.m. and was felt powerfully in Fukushima and Sendai.
No serious damage was immediately reported, but the authorities warned residents to brace for aftershocks in the coming days.
The quake struck as Tokyo and nine other large prefectures are under a state of emergency to contain the coronavirus. Residents are encouraged to work from home and avoid going out at night, while restaurants and bars are closed at 8 each night.
Japan is also preparing to host the summer Olympics, postponed by a year from 2020. The Games are scheduled to open on July 23.