High Resolution Simultaneous Tomographic Inversion for Attenuation and Velocity Structure at Loma Prieta, Using Local Earthquakes

这项研究是利用美国国家科学基金会和IRIS PASSCAL新仪器获得的与洛马普里塔地震序列有关的5000多次余震的地震数据，得出圣安德烈亚斯断层附近55×45公里范围内P波和S波的速度和衰减的高分辨率(数百米量级)层析图像。最初，将检查单独的反演，并将其与已知的地质和地球物理观测相关联。将开发一种结合速度、衰减和重力的联合反演，要求所产生的模型反映通过独立的地球物理观测所了解的模型。这项研究是国家减少地震灾害计划的一部分。

This research is to use seismic data from permanent and the new NSF/IRIS PASSCAL instruments for over 5000 aftershocks associated with the Loma Prieta earthquake sequence to derive high resolution (on the order of hundreds of meters) tomographic images of P- and S-wave velocity and attenuation along a 55 X 45 km region near the San Andreas fault. Initially, separate inversions will be examined and correlated with known geologic and geophysical observations. A joint inversion, incorporating velocity, attenuation and gravity will be developed requiring the resulting models to reflect what is known about the model through independent geophysical observations. This research is a component of the National Earthquake Hazard Reduction Program.