Estimating the Frictional Strength of the Crust Using Earthquake Focal Mechanism Data

这项研究是研究人员从地震滑动矢量的方向推断地壳应力的状态和方向的工作的延续。对解的形式进行了扩展，并包含了一个通用的（伪）摩擦系数，从而可以推导出地壳对断裂的摩擦阻力的一些概念。该技术将应用于各种构造环境的数据集，包括板块边界和板块内环境，并跨越一系列源深度。本研究对国家减少地震灾害计划有直接应用价值。

This research is a continuation of the work of the investigators that deduces the state and direction of stress in the earth's crust from the orientation of the slip vectors of earthquakes. The formalism of the solution has been extended and the present work includes a universal (pseudo) friction coefficient so that some idea of the frictional resistance of the crust to faulting can be deduced. This technique will be applied to data sets from a variety of tectonic environments, including both plate boundary and intraplate settings, and spanning a range of source depths. This research has direct application to the National Earthquake Hazard Reduction Program.