An earthquake of preliminary magnitude 5.6 struck Fukushima Prefecture and surrounding areas in Japan's northeast on Thursday morning but posed no tsunami threats, the Japan Meteorological Agency said.
The operator of the damaged Fukushima Daiichi nuclear power plant said it detected nothing out of the ordinary as a result of the 9:11 a.m. temblor, which occurred in the Pacific Ocean off the Fukushima coast at a depth of around 40 kilometers.
The quake registered up to 4 on the Japanese seismic scale of 1 to 7 in parts of Fukushima and Miyagi prefectures, and was felt in a wide swath of eastern Japan, including Tokyo.
