Tensor Electromagnetic Profiling Across the San Andreas Fault

这是一个跨越加州中部圣安德烈亚斯断层收集连续张量电磁剖面（EMAP）的项目。该实验有可能解决与地震过程直接相关的目标，包括断裂带内的高导电性和可能的高孔隙压力区域，断裂带和乡村岩石之间的电阻性和因此不透水的膜，以及脆性-韧性过渡下增强的地壳导电性。然而，在发震深度对断裂带内的电性结构进行详细调查可能需要一个可控的电磁源，并结合一个深钻孔。详细了解背景电结构是设计此类实验的关键要求，提供这些信息与从EMAP数据中获得直接见解的可能性同样重要。＊＊＊

9316160 Booker This is a project involving the collection of a continuous tensor electromagnetic profile (EMAP) across the San Andreas Fault in central California. The experiment has the potential to resolve targets of direct relevance to the earthquake process including high conductivity and presumably high pore pressure regions within the fault zone, resistive and hence impermeable membranes between the fault zone and the country rock and enhanced crustal conductivity below the brittle-ductile transition. However, detailed investigation of electrical structure within the fault zone at seismogenic depths is likely to require a controlled electromagnetic source deployed in conjunction with a deep drill hole. Detailed knowledge of the background electrical structure is a key requirement for design of such an experiment and providing this information is as important as the potential for direct insight from the EMAP data. ***