Appraisal of Relative Earthquake Location Errors

本课题是一项完善震源误差估计的理论研究。重点是寻找一种实用的方法来进行多震源误差估计。本研究将把以往的两事件方法推广到多个事件，并对非参数方法进行评价。开发的新技术将应用于三个地震数据集：1987年6月10日伊利诺伊州东南部地震的余震、1984年加利福尼亚州摩根山地震破裂带地区的地震活动和苏联加尔姆地区的地震活动。地震震源位置及其不确定性直接关系到我们圈定活动断裂面的能力，因此这项研究对国家减少地震灾害计划的目标具有重要意义。

This project is a theoretical study to improve the estimation of earthquake hypocenter errors. The focus is on finding a practical way to do multi-hypocenter error estimation. The research will extend previous 2-event methods to many events, and evaluate non-parametric methods. The new techniques developed will be applied to three earthquake data sets: aftershocks of the June 10, 1987, southeast Illinois earthquake, seismicity in the area of the rupture zone of the 1984 Morgan Hill, California, earthquake, and seismicity in the Garm region of the USSR. Earthquake hypocenter locations, and their uncertainties, are directly applicable to our ability to delineate active fault surfaces and therefore the research is important to the goals of the National Earthquake Hazards Reduction Program.