Detecting subsurface active faults by Ground Penetrating Rada

在构造地貌解释困难的冲积低地，为了探测活动断裂的地下位置，尝试利用探地雷达系统寻找有效的研究方法。我们可以从已知活动断层记录中的扰动模式中假定地下断层。然而，如果没有活动断层的位置信息，很难准确地探测到地下活动断层的位置和详细结构。在日本这样的湿润地区，浅层地下水位频繁干扰渗透电磁波进入软质沉积物，因此，GPR可能不是搜索地下活动断层的有效工具，除非在非常罕见的干燥条件下，如海滩山脊和沙丘。

In order to detect subsurface location of active faults in alluvial lowland where geomorphic interpretation of tectonic features are difficult, we tried to find effective research method by using Ground Penetration Radar system. We could assume subsurface fault from disturbed pattern in the records across active faults ever known. However, it is very difficult to detect location and detailed structure of subsurface active fault correctly if we do not have any information about location of active fault. In the humid zone like Japan, shallow water table frequently disturbed penetration electromagnetic waves into soft sediments, and as a result, GPR may not be a effective tool for searching subsurface active faults except in very rare dry condition such as beach ridges and sand dune.