A tsunami warning has been issued in Japan after a strong earthquake struck the Pacific Ocean east of the northeastern Tohoku Region, prompting alerts for waves reaching up to three meters along parts of the coastline, according to authorities.
The Japan Meteorological Agency initially estimated the quake at magnitude 7.4 before revising it upward to 7.7, underscoring the strength of the seismic event. Officials warned that aftershocks of up to magnitude 7.5 remain possible over the coming week, urging residents in affected areas to remain on alert.
A tsunami warning was issued for coastal areas in the prefectures of Iwate Prefecture, Aomori Prefecture, Miyagi Prefecture, and southern Hokkaido. Waves measuring around 70 centimeters have already been observed reaching parts of Iwate, with additional wave activity detected several kilometers offshore.
Despite the severity of the quake and tsunami alert, no casualties or significant damage have been reported so far. Energy operator TEPCO confirmed that no abnormalities were detected at the Fukushima Daiichi or Fukushima Daini nuclear plants following the tremor, while authorities also reported normal conditions at the Onagawa facility in Miyagi Prefecture.
Emergency monitoring remains in place as Japan assesses potential aftershocks and continued tsunami risks along its northeastern coastline.
