著者

飯尾 能久 松本 聡 松島 健 植平 賢司 片尾 浩 大見 士朗 澁谷 拓郎 竹内 文朗 西上 欽也 廣瀬 一聖 加納 靖之 儘田 豊 宮澤 理稔 辰己 賢一 和田 博夫 河野 裕希 是永 将宏 上野 友岳 行竹 洋平 Bogdan ENESCU

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.58, no.4, pp.463-475, 2006-03-31 (Released:2010-03-11)

参考文献数

44

被引用文献数

1 2

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The 2004 Mid Niigata Prefecture Earthquake (MJMA 6.8) occurred on 23 October 2004. The mainshock was followed by four aftershocks with MJMA≥6.0. This earthquake is located in the Niigata-Kobe Tectonic Zone in which large strain rates (>0.1ppm/y contraction) have been observed by GPS data. We deployed three temporary online seismic stations in the aftershock area. Combining data from the temporary stations and from permanent stations around the aftershock area, we determined aftershock locations, and estimated the structures and the stress change in and around the aftershock region. Based on these results, we suggested a generating process of the 2004 Mid Niigata Prefecture Earthquake supposing that a very weak region exists in the weak zone in the lower crust just beneath the seismogenic fault.