Determination of Earthquake Source Parameters from Waveform Data for Studies of Global and Regional Seismicity

从波形数据确定震源参数用于全球和区域地震活动研究

• 批准号: 8803669
• 负责人: Adam Dziewonski
• 金额: $ 22.77万
• 依托单位: Harvard 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 1991-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8803669&HistoricalAwards=false
• 关键词: Determination; Earthquake; Source; Parameters; Waveform

The proposed continuation of global and regional studies of earthquake source mechanism using waveforem inversion will cover the following topics: 1. Continuation of the centroid-moment tensor (CMT) analysis of current events using GDSN, and other - as available - data, with the results sent to the USGS on a monthly basis and submitted quarterly for publication in the Physics of the Earth and Planetary Interiors. 2. Utilization of the data from the High-Gain Long-Period (HGLP) network operating between 1972 and 1976; this was the first global digital network and little use has been made of it; will determine station responses and sensitivities; permanent storage on the optical media (WORM type discs); 3. CMT and very broad bank (VBB) 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 events with a statistically significant non-double couple component; it is highly likely that there are events which have an unusual source mechanism: two events near Torishima Island, south of Japan and three events on Iceland have mechanism that appear to be consistent with being caused by magma injection. ***

拟议继续进行全球和区域研究， 使用波形反演的震源机制将涵盖 以下主题： 1. 继续质心矩张量（CMT）分析 使用GDSN的当前事件，以及其他-如可用- 数据，每月将结果发送给USGS 并每季度提交一次，以便在 地球物理学和行星内部。 2. 利用高增益长周期 （HGLP）网络在1972年至1976年之间运行;这是 第一个全球数字网络， 由它制成;将决定车站的反应， 灵敏度;在光学介质上的永久存储 (WORM类型光盘）; 3. HGLP数据的CMT和极宽库（VBB）分析 1972年至1976年期间的选定事件;这一时期 其特点是缺乏许多大地震， 远，正确的分析; 4. 系统搜索具有统计学意义的事件 重要非双耦合组件;其高度 很可能有一些事件有一个不寻常的来源 机制：两个事件附近的鸟岛，南部的 日本和冰岛的三个事件都有机制， 似乎是由岩浆造成的 注射 ***