An earthquake registering a preliminary magnitude of 7.7 off northern Japan on Monday prompted a short-lived tsunami alert and the advisory of a higher risk of a possible mega-quake for coastal areas there.
The Cabinet Office and the Japan Meteorological Agency said there was a 1% chance for a mega-quake, compared to a 0.1% chance during normal times, in the next week or so following the powerful quake near the Chishima and Japan trenches, Associated Press reports.
The Fire and Disaster Management Agency said only one person in Aomori, north of Iwate, was injured after falling due to Monday’s quake.
Still, Monday’s events were a reminder to the quake-prone area of the March 2011 disaster that ravaged large swaths of the northern coast, triggering a nuclear crisis in Fukushima.
The quake occurred off the coast of Sanriku at around 4:53pm local time (0753 GMT) Monday, at a depth of about 19km (11 miles), the meteorological agency said.
Footage on NHK television showed hanging objects swaying and people squatting at a shopping centre in Aomori, as authorities told people to seek higher ground and stay away from coastal areas.
Shinkansen bullet trains connecting Tokyo and northern Japan were suspended.
A tsunami of about 80cm (2.6ft) was detected at the Kuji port in Iwate prefecture within an hour of the quake.
The US-based Pacific Tsunami Warning Center later said the tsunami threat “has now passed.”
The Nuclear Regulation Authority said nuclear power plants and related facilities in the region were intact and no abnormalities were detected.
The disaster management agency said at one point more than 170,000 people in five northern prefectures from Hokkaido to Fukushima were advised to take shelter. It is now 11pm in Japan and given the downgrading of the tsunami alerts we will be closing this blog shortly.
