Collaborative Research: Field demonstration of utility of NEES Vibrator to meet EarthScope science objectives for earthquake-hazard and crustal-structure studies

合作研究：现场演示 NEES 振动器的实用性，以满足 EarthScope 地震灾害和地壳结构研究的科学目标

• 批准号: 0444696
• 负责人: Simon Klemperer
• 金额: $ 1.76万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-10-01 至 2005-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0444696&HistoricalAwards=false
• 关键词: Collaborative; Research; Field; demonstration; utility

The George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) is a Major Research Equipment project funded through the Engineering Directorate of NSF. One of NEES' major field experimentation and monitoring installations is the large-scale mobile shakers (seismic vibrators) and associated instrumentation for dynamic field studies of geotechnical and structural systems operated at UT Austin by Professors Stokoe, Rathje and Wilson. EarthScope is the largest Major Research Equipment project ever funded in the Geosciences Directorate of NSF. As such, it will be the flagship project affecting the majority of academic geoscientists in the USA for the next decade, and will advance our understanding of the structure, evolution and dynamics of the North American continent. This demonstration project will attempt to demonstrate the utility of the NEES vibrators in conjunction with the national seismic instrumentation pool operated by IRIS-PASSCAL, for high-resolution reflection imaging (for earthquake-hazard reduction and other projects), crustal deep reflection and refraction profiling (for Earthscope continental structure projects), and shear-wave crustal profiling to measure anisotropy (for physical property measurements of fluids in sediments for seismic performance analysis, up to strain patterns in the deep crust needed to understand the dynamics of the continents). The demonstration is proposed to be in a geographic area of existing Earthscope interest, funded for study in the first year of EarthScope science funding. Our demonstration will address primary science objectives of Earthscope in ways not possible with existing Earthscope facilities.The USArray component of the EarthScope experiment is a continental-scale seismic observatory designed to provide a foundation for integrated studies of continental lithosphere and deep Earth structure over a wide range of scales. The USArray facility will consist of three major seismic components, of which one is a flexible component of 400 portable, three-component, short-period and broadband seismographs ("Flexarray") of 2000 single-channel high frequency recorders for active and passive source studies that will augment the transportable broadband passive seismic array. Currently, a major gap in Earthscope planning is that there is no easy access to active seismic sources. This is a gap that the NEES vibrators can help fill - if our test is successful.

小乔治·e·布朗地震工程模拟网络（NEES）是由美国国家科学基金会工程理事会资助的一项重大研究设备项目。NEES的主要现场实验和监测装置之一是大型移动振动器（地震振动器）和相关仪器，用于德克萨斯大学奥斯汀分校由Stokoe、Rathje和Wilson教授操作的岩土工程和结构系统的动态现场研究。EarthScope是美国国家科学基金会地球科学理事会资助的最大的主要研究设备项目。因此，它将成为未来十年影响美国大多数学术地球科学家的旗舰项目，并将促进我们对北美大陆结构、演化和动力学的理解。这个示范项目将试图展示NEES振动器与IRIS-PASSCAL操作的国家地震仪器池的效用，用于高分辨率反射成像（用于减少地震危险和其他项目）、地壳深反射和折射剖面（用于地球范围大陆结构项目）、以及测量各向异性的剪切波地壳剖面（用于地震性能分析的沉积物流体的物理特性测量，以及了解大陆动力学所需的地壳深部应变模式）。该演示被提议在现有的地球范围感兴趣的地理区域进行，为地球范围科学基金第一年的研究提供资金。我们的演示将以现有地球望远镜设备无法实现的方式解决地球望远镜的主要科学目标。EarthScope实验的USArray组件是一个大陆尺度的地震观测站，旨在为大范围内大陆岩石圈和深部地球结构的综合研究提供基础。USArray设备将由三个主要地震组件组成，其中一个是由400个便携式、三组件、短周期和宽带地震仪（Flexarray）组成的灵活组件，该组件由2000个单通道高频记录仪组成，用于有源和无源震源研究，这将增强可移动宽带无源地震阵列。目前，Earthscope规划的一个主要缺陷是无法方便地获取活动震源。如果我们的测试成功，NEES振动器可以帮助填补这一空白。