Source Time Functions and Stress Drop

源时间函数和应力下降

• 批准号: 9725175
• 负责人: Larry Ruff
• 金额: $ 6.76万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-04-01 至 2001-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725175&HistoricalAwards=false
• 关键词: Source; Time; Functions; Stress; Drop

9725175 Ruff This research is a continuation of the routine cataloging of large-earthquake source time functions, and the investigation into the application of this catalog to study of tectonic regions of the earth. The cataloging of source time functions is an addition to traditional on-going cataloging of earthquake parameters including the time, location, magnitude, first-motion focal mechanism, and the moment tensor. The source time function is the history of the moment release during the earthquake that, depending on the frequency-content of the energy, is spatially averaged over the faulted region. Shorter-period energy gives more detail of the earthquake rupture process. Further investigation involves the search for systematics of parameters of the source time function that can give insight into earthquakes as a function of their tectonic setting. This research is a component of the National Earthquake Hazard Reduction Program. ***

本研究是大震源时间函数常规编目工作的延续，也是大震源时间函数编目在地球构造区域研究中的应用研究。震源时间函数的编目是对地震参数（包括时间、位置、震级、初动震源机制和矩张量）的传统持续编目的补充。震源时间函数是地震过程中瞬间释放的历史，根据能量的频率含量，在断层区域上进行空间平均。较短的周期能量提供了地震破裂过程的更多细节。进一步的调查包括寻找源时间函数参数的系统分类，这可以使人们深入了解地震作为其构造环境的函数。这项研究是国家减少地震危害计划的一个组成部分。＊＊＊