Continued Operation of an Earthquake Strong Motion Accelerograph Network Along the Mexican Subduction Thrust

沿着墨西哥俯冲冲断层的地震强运动加速器网络的持续运行

• 批准号: 9120027
• 负责人: John Anderson
• 金额: $ 31.87万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-02-15 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9120027&HistoricalAwards=false
• 关键词: Continued; Operation; Earthquake; Strong; Motion

The Guerrero Accelerograph Array consists of 30 strong motion accelerograph stations in Guerrero and neighboring states of Mexico. It was installed under NSF grant CEE-82-19432 and has continued to be fully operational through subsequent support from the National Science Foundation, supplemented by support from the Instituto de Ingenieria, Universidad Nacional Autonoma de Mexico. The array is currently recording accelerograms from 50 to 80 earthquakes each year, and the resulting data set includes records from over 25 significant earthquakes, with four earthquakes having magnitudes 6.9 or greater at close range. Most important, it is located in a mature seismic gap where an earthquake with magnitude up to 8.2 is considered more likely to occur than any at other place in North America. The objectives of the Guerrero array are: (a) To obtain high quality accelerograms from strong shaking caused by magnitude 7.5 to 8 earthquakes along the Mexican subduction thrust; (b) to distribute these data and to use them to predict the strong ground motions from future earthquakes with sufficient precision so as to be useful for engineering applications; and (c) in particular, to address the problem of ground motion on basement rock in a subduction zone environment similar to that found in Alaska, the Pacific Northwest and Puerto Rico. This action is for continued operation of this array; to catalog and distribute any new data recorded; to interpret the accelerograms that have been recorded; and to use the best available methods to attempt to predict the nature of the strong ground motions resulting from anticipated future subduction-zone earthquakes.

格雷罗加速器阵列由格雷罗和墨西哥邻近州的30个强震加速器站组成。它由美国国家科学基金会拨款CEE-82-19432安装，并在美国国家科学基金会的后续支持下继续全面运作，并得到墨西哥国立自治大学工程研究所的补充支持。该阵列目前每年记录50到80次地震的加速度，产生的数据集包括超过25次大地震的记录，其中4次近距离地震的震级为6.9级或以上。最重要的是，它位于一个成熟的地震间隙，在那里发生8.2级地震的可能性比北美其他任何地方都要大。Guerrero阵列的目标是：(a)从沿墨西哥俯冲逆冲的7.5 - 8级地震引起的强烈震动中获得高质量的加速度图；(b)分发这些资料，并利用这些资料以足够的精度预测未来地震的强烈地面运动，以供工程应用；(c)特别是，在类似于阿拉斯加、太平洋西北部和波多黎各发现的俯冲带环境中，解决基底岩石上的地面运动问题。这个动作用于继续这个数组的操作；对新记录的数据进行编目和分发；解释已经记录下来的加速度；并使用最好的可用方法来尝试预测由预期的未来俯冲带地震引起的强烈地面运动的性质。