Geotechnical Experimentation Planning Committee for Treasure Island, CA, Deep Instrumentation Array

位于加州金银岛的深层仪器阵列是目前美国用于测量强震影响的仪器最多、性能最好的装置之一。 它位于旧金山弗朗西斯科湾，在圣安德烈亚斯和海沃德断层之间。 在1990年，7级或更大的事件或其他这些故障的总概率估计为67%，在随后的30年;更新的信息可能会导致这一估计被向上修订。该网站是由美国国家科学基金会在1991-1992年建立的，以直接测量的非线性响应的深层土壤剖面强烈的地面震动。 该场地由基岩上86米深的软土剖面组成。 类似的土壤条件存在于旧金山弗朗西斯科湾区的大部分地区和其他具有类似地震风险的城市。 该岛正在由美国海军转移到弗朗西斯科市，旧金山市强烈支持这一阵列的继续存在。 仪器由加州强震仪器计划维护，该计划也致力于发布强震数据。这一行动是为了建立一个委员会来监督该阵列的运行以及该网站在减轻地震灾害研究中的使用。 该委员会将由来自学术界、政府机构和私人执业的地震学家和岩土工程师组成。 该委员会将严格审查研究中心表征和仪器的状态，定义可在该研究中心进行的实验，并作为希望在该研究中心进行实验的研究者的主要联系人。

The Treasure Island, California, deep instrumentation array is currently one of the most heavily-instrumented and best-characterized installations in the United States for measuring the effects of strong motion earthquakes. It is located in San Francisco Bay, between the San Andreas and the Hayward faults. In 1990, the aggregate probability of an event of magnitude 7 or greater on or the other of these faults was estimated at 67% over the subsequent 30 years; newer information may cause this estimate to be revised upward.The site was established in 1991-1992 by the National Science Foundation to directly measure the non-linear response of a deep soil profile to strong ground shaking. The site consists of an 86 meter deep soft soil profile over bedrock. Similar soil conditions exist under large parts of the San Francisco Bay Area and in other cities with a similar earthquake risk. The Island is in the process of being transferred by the US Navy to the City of San Francisco, which strongly supports the continued existence of this array. Instrumentation is maintained by the California Strong Motion Instrumentation Program, which is also committed to publishing the strong-motion data.This action is to establish a committee to oversee the operation of this array and the use of this site for research in earthquake hazard mitigation. The committee is to be composed of seismologists and geotechnical engineers from academia, government agencies, and private practice. This committee will review critically the state of the site characterization and instrumentation, define experiments that could be performed at this site, and serve as the primary point of contact for investigators wishing to undertake experiments at this site.