Nonlinear Velocity Inversion for Subsurface Imaging of Southern California Faults

本研究将发展非线性速度反演 一种解释弯曲的地震射线路径的技术， 横向不连续性 活断层道地震成像 在南加州进行的先前项目已导致 Garlock和Hosgri的非垂直倾角描述 断层 然而，这些衍射迁移到真正的深度， 由于缺乏对周围横向的了解， 速度的变化，这是本研究要解决的问题。 应用 在测量数据交叉的偏移之前， 加州南部的地震断层将有助于解决 区域地震危险性的模糊性。 这项研究是一个 国家地震减灾计划的一部分。

This research will develop a nonlinear velocity inversion technique that accounts for curved seismic ray paths through lateral discontinuities. Seismic imaging of active fault traces in southern California carried out by previous projects has led to the description of non-vertical dips for the Garlock and Hosgri faults. However, migration of these diffractions into a true depth section is impeded by lack of knowledge of the surrounding lateral velocity variations, which this research will address. Application of this inversion prior to the migration of survey data crossing earthquake faults in southern California will help to resolve ambiguities in regional seismic hazard. This research is a component of the National Earthquake Hazard Reduction Program.