Kirchhoff Coda Migration of Regional Network Data

小行星9614874 这项研究涉及映射的地壳散射体的克希霍夫迁移反演技术的应用程序的本地地震数据。 目前的研究已经成功地emonstrated使用三种不同的散射模式的方法的有效性。 1)P散射到Rg由于地形和散射Rg由于剪切波的不均匀性; 2）P到P散射由于俯冲板片;和3）P到S散射由于断裂带的不均匀性，推测时间的性质有关的地震发生的时间。 这项工作将涉及修改迁移技术，以更好地模拟高频波传播，包括方位角变化的散射强度和现场响应，并使用最新的层析模型在旅行时间计算。 将使用来自加州、夏威夷和华盛顿西部地震台阵的数据。 其结果与地震危险性制图、火山危险性制图和地壳上地幔结构有关。 这项研究是国家地震减灾计划的一个组成部分。 ***

9614874 Revenaugh This research involves the mapping of crustal scatterers by means of the application of Kirchhoff migration inversion techniques to local earthquake data. Current research has successfully emonstrated the effectiveness of the methodology using three different scattering modes. 1) P scattered into Rg due to topography and scattered Rg due to shear-wave heterogeneity; 2) P to P scattering due to a subducting slab; and 3) P to S scattering due to fault zone heterogeneity, presumably temporal in nature related to the timing of earthquake occurrence. This work will involve modification of the migration technique to better model high-frequency wave propagation, include azimuthally varying scattering intensity and site responses and use the latest tomographic models in the travel time calculations. Data from seismic arrays in California, Hawaii, and western Washington will be used. The results are related to earthquake hazard mapping, volcanic hazard mapping and crustal and upper mantle structure. This research is a component of the National Earthquake Hazard Reduction Program. ***