The Fukuoka earthquake 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 (6.6) and named it and its subsequent aftershocks the Fukuoka Prefecture Western Offshore Earthquakes (福岡県西方沖地震 ). 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.