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

利用当地地震对洛马普列塔的衰减和速度结构进行高分辨率同步层析成像反演

• 批准号: 9011441
• 负责人: Jonathan Lees
• 金额: $ 4.9万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9011441&HistoricalAwards=false
• 关键词: Resolution; Simultaneous; Tomographic; Inversion; Attenuation

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.

这项研究将使用来自永久性和新型 NSF/IRIS PASSCAL 仪器的地震数据，记录与洛马普列塔地震序列相关的 5000 多次余震，以获得沿圣安德烈亚斯断层附近 55 X 45 km 区域的纵波和横波速度和衰减的高分辨率（数百米量级）断层扫描图像。 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结果相关联。 将开发结合速度、衰减和重力的联合反演，要求所得模型反映通过独立地球物理观测已知的模型信息。 这项研究是国家地震减灾计划的一部分。