Fault distribution at the western part of Minoh Fault System by archaeological data, Kurume City, Fukuoka Prefecture

679年筑紫地震作为地震记录首次出现在历史文献（日本书）中。本次地震是在地震断层系最新活动的背景下发生的，在大量的考古遗址中发现了地震引起的地面现象。本研究的目的是根据679年筑紫地震时筑后省会周围的考古遗址，阐明地震断层系西部的分布形态。通过收集筑后省府及其周边地区400处的挖掘资料，对裂缝等地震现象进行了说明。2007年，在2006年的基础上增加了新的考古发掘材料，尝试在大比例尺地形图中进行表达，以便于使用。通过本次调查，明确了弥诺断层系西部的断层分支形式，讨论了断层开始破裂的位置，以及断层系统中大震动的延伸位置。然而，在第四纪位移量大的千本杉断层，769年筑紫地震引起的垂直位移量还不清楚。另外，如果能弄清整个米诺断层系的分布，就能了解米诺断层系活动的出现，为地区防灾提供重要信息。

The 679 Chikushi Earthquake appeared to historical documents (Nihonshoki) for the first time as an earthquake record. This earthquake had occurred by the latest activity of the Minoh Fault System and ground phenomena due to the earthquake were found with a lot of archaeological ruins diggings points.This research aimed to elucidate the distribution form of the western part of the Minoh Fault System based on archaeological ruins around the Chikugo Provincial Capital at the 679 Chikushi Earthquake.Fiscal year 2006, the earthquake phenomena such as the cracks were elucidated with the collection of the excavation material in 400 places related to Chikugo Provincial Capital and its environs. Fiscal year 2007, it was tried to express them in the large scale topographical map to use it easily based on the result in fiscal year 2006 adding new excavation archaeological materials.The fault branching form in the western part of the Minoh Fault System was clarified by this survey, that the discussion will become possible where it begin to rupture, and where does a large shake extend in the fault system. However, the amount of vertical displacement due to the 769 Chikushi Earthquake is not understood in Senbonsugi Fault with a big Quaternary amount of displacement.In addition, if the distribution of the entire Minoh Fault System will clarify, the appearance of the activity by Minoh Fault System will be able to understand, and important information on regional disaster prevention will be offered.