Warnings for a tsunami as high as 3m have been issued for the Japanese coastline after a powerful 7.4-magnitude earthquake struck off the northeastern coast.
The earthquake struck off the Sanriku coast at 4.53pm local time, with its epicentre located at latitude 39.8 north and longitude 143.2 east, according to the Japan Meteorological Agency (JMA). The epicentre of the earthquake was located around 100km east of the coastal city of Miyako in Iwate prefecture.
