A magnitude 6.1 earthquake shook the Japanese capital, Tokyo, and surrounding areas on Thursday evening, but no tsunami alert was issued, the Japan Meteorological Agency said.
The quake shook buildings and sent emergency warnings from locals’ phones, giving them time to shelter.
Preliminary reports from the JMA said the epicenter was reported below the epicenter, at 10:41 pm (1341 GMT), in the eastern province of Siba, east of Tokyo. There were no immediate reports of injuries or damage.
The US Geological Survey put the quake’s magnitude 5.9 at a depth of 61 kilometers.
Some bullet and local train services were halted as a precaution after the quake, but local media from Tokyo and surrounding areas did not appear to have any major impact from the quake.
Tests were also underway at regional nuclear power plants, but no reports of abnormalities were reported.
Hundreds of Tokyo homes are said to be without electricity after the quake.
The epicenter was reported below the Pacific Ocean floor, however; no tsunami alert was issued.
Newly elected Prime Minister Fumio Kishida urged residents in a tweet to “please take action to save lives while checking the latest information.”
Japan sits on the Pacific “Ring of Fire”, a curve of intense seismic activity that extends across Southeast Asia and the Pacific Ocean.
Last week, a magnitude 6.1 earthquake shook the northwestern coast of Japan and caused no damage.
The country is constantly affected by earthquakes and has strict construction regulations to ensure that buildings can withstand strong earthquakes.
But it triggered the deadly tsunami of the March 11, 2011 submarine earthquake and unleashed the Fukushima nuclear accident.
The tsunami killed 18,500 people or is missing.