[S-CG60] 地殻流体と地殻変動

[SCG60-04] 断層帯の水理属性の見積もり - 長野県北部地震に伴う湧泉を用いた例

*田中 秀実¹、Ma Kuo-Fong²、佐藤 努³、角森 史昭¹、松本 則夫³、梅田 浩司⁵、風早 康平³、藤澤 和謙⁴、楠原 文武¹ (1.東京大学大学院理学系研究科、2.台湾國立中央大学地球物理研究所、3.産業技術総合研究所地質調査所、4.京都大学農学部、5.日本原子力開発機構東濃地科学センター)

キーワード：長野県北部地震、神城断層、湧泉、断層破砕帯、水理属性

On November 28, An M 6.7 earthquake occurred at northern part of Nagano Prefecture, Central Japan. The Kamishiro Fault,which has been well known as to be a part of Itoigawa-Shizuoka Tectonic Line, was activated by the earthquake and surface rupture about 9 km in length was appeared along it’s trace.
Post-seismic fluid discharge was observed from the fracture zone of the Kamishiro Fault. Our team has been observed and monitored the flow amount and chemical characteristics of the fluid for about 5 months from one week after the earthquake.
In this presentation, we describe the occurence of earthquakes and its relation to the hydraulic propertes and discuss about the governing equations of fluid flow in fracture zone ofthe Kamishiro Fault.