Use of Tsunamis for Seismology

本研究是利用1850年以来高质量的海啸潮汐仪地震记录，将大陆附近地震活跃带的地震历史向后延伸，超过良好的现代地震记录的时间，只有大约30年。地震学中的突出问题包括地震活动的时间变化及其对全球应变变化的影响、大地震破裂模式的变化、断裂面上的滑动分布，特别是俯冲带增生楔下的滑动分布，以及可能是非断层成因的异常海啸性地震。本研究建议对海啸数据进行定量分析，以提高我们对这些过程的认识。这项工作直接适用于国家减少地震灾害计划。

This research is to utilize the high-quality tsunami tide-gauge records for earthquakes as far back as 1850 to extend earthquake history for active seismic zones near continents backwards beyond the time of good modern seismic records, only about 30 years. Among the outstanding problems in seismology are temporal variation of seismic activity and its effects on global changes in strain, variable rupture mode of great earthquakes, slip distribution on a fault plane, especially beneath the accretionary wedge in subduction zones, and anomalous tsunamigenic earthquakes of presumably non-fault origin. This research proposes to conduct quantitative analysis of tsunami data to improve our knowledge of these processes. This work has direct application to the National Earthquake Hazard Reduction Program.