跡津川断層系における地震探査

Earthquake investigation in the Atotsugawa Fault System

竹村 友之*; 武部 晃充*

Takemura, Tomoyuki*; Takebe, Akimitsu*

本調査では,跡津川断層系の茂住-祐延断層の地下構造に関する基礎データを取得する目的で,同断層付近の地表近くで火薬を爆破して人工地震を起こし,地表および同断層を貫く活断層調査坑道内で爆破による地震動の観測を行った。

In this study, artificial earthquake is triggered by gunpowder explosion near the surficial part of the Mozumi-Sukenobu Fault in the Atotsugawa Fault System, for the purpose of the basic data collection about the underground structure of the fault. And seismic wave derived from the explosion is observed on the surface and in the investigation tunnel across the fault.