Acquisition of 10 Broadband Seismographs for Enhancement of TERRAscope

9512201 Kanamori这项赠款提供部分支持(48%)，用于购买和安装南加州最先进的数字地震台站。每个测站由一个宽带Streickeisen(STS-2)地震仪、一个力平衡加速度计和一个6通道24位Quanterra Inc.数据记录器组成。计划新建五个车站。该仪器可以准确、完整地测量来自大小震、遥震和区域地震的地震波。新提议的仪器补充了现有的宽带地震台网络，称为TERRASCOPE。目前，TERRASCOPE由17个空间站组成。新的仪器将大大提高TERRASCOPE的空间分辨率，将网络中心部分目前150公里的站间距减少数十公里。目前，南加州现有的大多数地震数据的动态范围有限，或者是在非常窄的频带上测量的，因此它们对一般研究的用处有限。此外，TERRA前的仪器没有以足够的精度进行校准，无法提供定量的幅度数据。这些仪器在南加州的位置提供了额外的好处，能够记录大规模的加州大地震，并以前所未有的详细程度研究它们的震源物理。将开展的研究和研究培训的类型将是地球结构和地震物理的基础地震学研究，以及在观测和理论地震学方面的博士后和博士后培训。将利用新数据开展的项目的例子有：1)确定核心地幔边界的结构；2)在加利福尼亚州南部对太平洋-北美板块边界进行成像；3)对世界各地的远震和美国西部的区域地震进行震源物理研究；4)将开发新的理论和计算方法来模拟地震数据。该项目将受益于加州理工学院与地震监测工作相关的现有和其他拟议项目。太平洋贝尔基金会(CalREN)免费提供数字数据传输。其他项目正在提供软件支持和数据处理设施。位于加州理工学院的南加州地震中心数据中心和IRIS DMS将通过互联网将数据分发给地震研究社区。***

9512201 Kanamori This grant provides partial support (48%) for the costs of acquisition and installation of state-of-the-art digital seismographic stations in southern California. Each station consists of a broadband Streickeisen (STS-2) seismometer, a force balanced accelerometer, and a 6 channel 24 bit Quanterra Inc. data logger. Five new stations are planned. This instrumentation can measure seismic waves from small and large earthquakes as well as from teleseisms and regional earthquakes accurately and completely. The new proposed instrumentation complements the existing network of broadband seismographic stations, called TERRAscope. Currently, TERRAscope consists of 17 stations. The new instrumentation will significantly increase the spatial resolution of TERRAscope by reducing current station spacing of 150 km by tens of kilometers within the central part of the network. Currently, most existing earthquake data for Southern California are of limited dynamic range or are measured over very narrow frequency bands and thus their usefulness for general research is limited. Furthermore, pre-TERRAscope instrumentation was not calibrated with sufficient accuracy to provide quantitative amplitude data. The location of these instruments in southern California provides the additional benefit of being able to record large California earthquakes on scale and study their source physics in unprecedented detail. The type of research and research training to be conducted will be fundamental seismological studies of earth structure and earthquake physics, as well as training of Ph.D. candidates and postdoctoral fellows in observational and theoretical seismology. Examples of the projects that will be carried out using the new data are: 1) determination of the structure of the core mantle boundary; 2) imaging of the Pacific-North America plate boundary in southern California; 3) studies of earthquake source physics of both teleseisms around the world and regional earthquakes in the Western US, 4) new theoretical and computational methods for modeling the seismic data will be developed. This project will benefit from existing and other proposed projects at Caltech related to the earthquake monitoring effort. The Pacific Bell foundation (CalREN) is providing digital data transmission at no cost. Other projects are providing software support and data processing facilities. The Data Center of the Southern California Earthquake Center located at Caltech and the IRIS DMS will distribute the data to the seismological research community via INTERNET. ***