Collaborative Research: Determination of Earthquake Source Parameters from Waveform Date for Studies of Global and Regional Seismicity

合作研究：从波形数据确定震源参数以研究全球和区域地震活动

• 批准号: 8803786
• 负责人: Geoffrey Abers
• 金额: $ 8.6万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8803786&HistoricalAwards=false
• 关键词: Collaborative; Research; Determination; Earthquake; Source

In this proposal for joint research with Harvard University we request funding for the continuation of global and regional studies of earthquake source mechanisms using waveform inversion. The research will cover the following topics. 1. Continuation of the centroid-moment-tensor (CMT) analysis of current events. 2. Utilization of the data from the High-Gain Long-Period (HGLP) network which operated between 1972 and 1976. 3. CMT and very broad band analysis of the HGLP data for selected events between 1972 and 1976. This period is characterized by many large earthquakes lacking, so far, proper analysis. 4. Systematic search for earthquakes with a statistically significant non-double couple component. Two events near Torishima Island, Japan, and three events on Iceland have mechanisms that appear to be consistent with magma injection. 5. Global synthesis. Compilation of a catalog CMT solution in a volume which would include discussion of the seismicity on a region by region basis. 6. Quasi-real time source studies. The objective is to produce reliable source mechanisms one to two hours after the occurrence of the event. 7. Analysis of spatio-temporal distribution of earthquakes and its relation to tectonic processes.

在这项与哈佛大学联合研究的提案中，我们要求提供资金，继续利用波形反演对地震震源机制进行全球和区域研究。这项研究将涵盖以下主题。1.继续当前事件的质心-矩-张量(CMT)分析。2.利用1972至1976年间运行的高增益长周期(HGLP)网络的数据。3.1972年至1976年选定事件的HGLP数据的CMT和甚宽频带分析。这一时期的特点是许多大地震，到目前为止，缺乏适当的分析。4.系统寻找具有统计意义的非双偶分量的地震。日本Torishima岛附近的两次地震和冰岛的三次地震的机制似乎与岩浆注入一致。5.全局综合。将目录CMT解决方案汇编成一卷，其中将包括在区域基础上讨论地震活动。6.准实时震源研究。目标是在事件发生后一至两小时内建立可靠的震源机制。7.地震时空分布及其与构造过程的关系分析。