Historical Earthquake Relocation

9506767 BOYD 本项研究是对国际地震学摘要（ISS）和中央国际地震局（BCIS）目录中的震相观测数据进行数字化扫描，利用这些观测数据，基于近几年发展起来的技术计算高质量的震源，根据这些重新定位的地震进行构造解释，并将数字化的相位观测和重新计算的震源提供给感兴趣的研究小组。 其结果将是一个更加完整和准确的地震活动目录，特别是在1964年WWSSN计划实施之前，可用于了解美国和世界各地的变形和地震危险。 这项研究是国家地震减灾计划的一个组成部分。 ***

9506767 BOYD This research is to digitally scan seismic phase observations tabulated in the International Seismological Summary (ISS) and Bureau Central International Seismologique (BCIS) catalogs, use these observations to compute high quality hypocenters based on techniques developed within the last few years, make tectonic interpretations based on these relocated earthquakes, and make the digitized phase observations and the recomputed hypocenters available to interested research groups. The result will be a much more complete and accurate seismicity catalog, especially prior to 1964 when the WWSSN program was implemented, that can be used to understand deformation and seismic hazard within the U.S. and throughout the world. This research is a component of the National Earthquake Hazard Reduction Program. ***