TOKYO (Reuters) - A strong earthquake jolted northern Japan early on Thursday, injuring at least 91 people, trapping hundreds in halted trains and temporarily cutting off electric power to thousands of homes. The Japan Meteorological Agency (JMA) said there was no threat of a tsunami from the quake, which struck at 00:26 (4:26 p.m. British time Wednesday) and had a preliminary magnitude of 6.8 and could be felt as far away as Tokyo.A National Police Agency official said that 91 people were confirmed injured, 15 of whom were seriously hurt. Many were injured in falls or suffered cuts from broken glass.
The focus of the quake was 108 km (67 miles) below the surface of the earth in Iwate prefecture, a mountainous, sparsely populated region. The JMA initially put the focus at a depth of 120 km.
"I woke up immediately. It felt like it was shaking for a long time. Books and other things that were piled up fell on the floor. All the doors were open and things were shattered," Sho Koseki, a city official in Hachinohe, about 550 km northeast of Tokyo, told Reuters by telephone. Koseki said that troops had arrived in the area to assist, and the Defence Agency said that military planes were flying over the area to assess the extent of the damage.
Earthquakes are common in Japan, one of the world's most seismically active areas. The country accounts for about 20 percent of the world's earthquakes of magnitude 6 or greater.