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

利用波前反演继续全球和区域震源机制研究将包括以下主题：1.质心矩张量(CMT)的继续。使用GDSN分析时事，以及其他可用的数据，结果每月发送给美国地质勘探局，每季度提交一次，发表在《地球和行星内部物理学》上。2.利用1972至1976年间运行的高增益长周期(HGLP)网络的数据；这是第一个全球数字网络，几乎没有人利用它；将决定台站的反应和灵敏度；在光学媒体(WORM类型光盘)上的永久存储；3.1972年至1976年选定事件的HGLP数据的CMT和VBB(VBB)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.系统地搜索具有统计意义的非双偶分量的事件；很可能有一些事件具有不寻常的震源机制：日本南部Torishima附近的两个事件和冰岛的三个事件的机制似乎与岩浆注入引起的一致。***

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. ***