2005 Fukuoka earthquake
The struck Fukuoka Prefecture, Japan at 10:53 am JST on March 20, 2005, and lasted for approximately 1 minute. The Japan Meteorological Agency (JMA) measured it as peaking at a magnitude of 7.0, whereas the United States Geological Survey (USGS) reported a magnitude of 6.6. The quake occurred along a previously unknown fault in the Genkai Sea, North of Fukuoka city, and the residents of Genkai Island were forced to evacuate as houses collapsed and landslides occurred in places. Investigations subsequent to the earthquake determined that the new fault was most likely an extension of the known Kego fault that runs through the centre of the city. Fukuoka is not as seismically active as many other parts of Japan, and was known prior to the earthquake as one of Japan's safest locations in terms of natural disasters; the previous earthquake, a magnitude 5, had occurred over a hundred years ago and it had been centuries since the city had experienced a serious earthquake. City introduction Fukuoka is located in the northern Kyushu, Japan, and it is in the center of the Fukuoka plain. Fukuoka is the most populous and developed prefecture in Kyushu. Geographically, Fukuoka is close to mainland East Asia, and the nearest megacity to Fukuoka is Seoul, South Korea, rather than a domestic Japanese city, and Fukuoka is about as far from Shanghai as Tokyo. As a result, Fukuoka has been the window of east Asian culture flowing into Japan since ancient times, and now there are many direct routes to Korea, mainland China and Taiwan. Description The strong earthquake occurred at 10:53 am in the Kyushu region, about 70 km west of Shimonoseki city in Yamaguchi prefecture. The depth of the earthquake was extremely shallow, with a presumed Richter scale of 7.0. The Japan meteorological agency said that quake's epicenter was in the sea of Japan, northwest of Fukuoka prefecture, and the epicenter was about 9 kilometers under the sea. As of 6 p.m. local time, the earthquake has caused 381 people injured and one dead. Kyodo News Agency, citing Japan's meteorological agency, said it was the strongest earthquake to hit Kyushu since May 1997, and the first to exceed magnitude 6 since 1898. Earthquake experts in Japan said it is rare for a strong earthquake to strike the area. A quake measuring about seven on the Richter scale struck three hundred years ago, but no major quake has struck after that. Fukuoka's most famous major fault, the Kego fault, runs northwest to southeast, roughly parallel to Nishitetsu's Ōmuta train line, and was thought to be 22 km long, terminating at Hakata Bay. It is estimated to be able to produce earthquakes as strong as magnitude 7 at the epicenter approximately once every 15,000 years. When a center is located at a depth of 10 km, it would cause an earthquake of a lower-6 magnitude (similar to the March 20, 2005 earthquake) in downtown Fukuoka. The probability of an earthquake along the known length of the Kego