The U.S. Geological Survey’s Rapid Seismic Array Deployment for the 2019 Ridgecrest Earthquake Sequence
The U.S. Geological Survey’s Rapid Seismic Array Deployment for the 2019 Ridgecrest Earthquake Sequence
复制标题
美国地质调查局为 2019 年里奇克莱斯特地震序列部署的快速地震台阵
DOI：
--
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
J. Steidl
中科院分区：
文献类型：
--
作者：
E. Cochran;E. Wolin;D. McNamara;A. Yong;D. Wilson;Mar Alvarez;Nicholas J. van der Elst;A. McClain;J. Steidl
大地震后的快速地震部署捕捉到了余震和环境噪声的短暂近场记录，可为地震学研究提供有价值的数据。2019年7月4日和7月6日(UTC)里奇克雷斯特市附近发生M_W 6.4和M_W 7.1地震后，美国地质调查局安装了19个临时地震台站。这些台站记录了主震后两天开始的余震序列，预计将持续到2020年1月左右。这一部署扩大了该地区的永久地震台网，以改善方位覆盖并提供更多的近场观测。本文总结了部署的动机和目标；站点安装、仪器和配置的详细信息；以及来自网络的初始数据质量和观测。我们预计这些数据将有助于一系列研究，包括详细描述强地面运动的近场变异性、确定小事件的应力降和破裂方向性、对断裂带成像、记录断裂带内外地壳性质的演变等。
Rapid seismic deployments following large earthquakes capture ephemeral near‐field recordings of aftershocks and ambient noise that can provide valuable data for seismological studies. The U.S. Geological Survey installed 19 temporary seismic stations following the 4 July 2019 M_w 6.4 and 6 July 2019 (UTC) M_w 7.1 earthquakes near the city of Ridgecrest, California. The stations record the aftershock sequence beginning two days after the mainshock and are expected to remain in the field through approximately January 2020. The deployment augments the permanent seismic network in the area to improve azimuthal coverage and provide additional near‐field observations. This article summarizes the motivation and goals of the deployment; details of station installation, instrumentation, and configurations; and initial data quality and observations from the network. We expect these data to be useful for a range of studies including detailing near‐field variability in strong ground motions, determining stress drops and rupture directivity of small events, imaging the fault zone, documenting the evolution of crustal properties within and outside of the fault zone, and others.