A tsunami alert was issued after a 7.4-magnitude undersea quake jolted the Miyagi prefecture in northeastern Japan late Thursday. There was no immediate word of damage or casualties, Xinhua reported.The quake occurred at 23.32 p.m. Thursday, according to the Japan Meteorological Agency. It issued a tsunami alert after the quake. The epicentre was located 40 km under the sea.
The tremor was also felt in Tokyo.
The quake has not caused any major problems at the nuclear power plants in nearby Fukushima prefecture, the Tokyo Electric Power Co. said.
The US Geological Survey said the quake occurred at 38 degrees north latitude and 142 degrees east longitude.
The region has been devastated by a 9-magnitude quake March 11 followed by a tsunami that left thousands of people dead and missing and crippled a nuclear plant.
