The NARS-Baja Seismic Array: Continued Operations and Research

由14台三分量宽带地震仪组成的宽带地震仪网络--NARS-BAJA网络(自主记录地震仪网络)--正在加利福尼亚州海湾附近的墨西哥巴哈和索诺拉建成和运行。这些仪器是与乌得勒支大学和恩塞纳达高级教育调查中心合作安装的，将至少运行3年。这些数据大约每三个月从台站检索一次，可通过IRIS数据管理中心和南加州地震数据中心获得。根据这些数据，研究人员正在利用接收函数、层析成像和面波分析绘制加利福尼亚州湾周围的地壳和上地幔结构图，目的是调查：1)加利福尼亚州湾和北美板块边界下的地幔结构的差异；2)地壳和地幔沿走向结构的复杂性与加利福尼亚州湾裂谷变形方式系统变化的可能关系；以及3)海湾活动断裂的位置及其滑动方向。该项目与其他NSF资助的大型项目(如EarthScope和Markets)具有很强的协同效应。

A broadband seismograph network - the NARS-Baja network (Network of Autonomously Recording Seismographs) - consisting of 14 three-component broadband seismographs is being completed and operated in Baja and Sonora, Mexico, around the Gulf of California. The instruments have been installed in cooperation with the University of Utrecht and Centro de Investigacion Cientifica y de Educacion Superior de Ensenada and will be in operation for at least for 3 years. The data are retrieved from the stations approximately every three months and are available through the IRIS-Data Management Center and the Southern California Earthquake Data Center. With these data, the investigators are mapping the crustal and upper mantle structure around the Gulf of California using receiver functions, tomography, and surface wave analysis with the aim to investigate the: 1) difference in mantle structure beneath the Gulf of California and the North American plate boundary; 2) the possible relation of along-strike structural complexity in the crust and mantle and the systematic change in deformation style in the Gulf of California rift; and 3) the location of active faults in the Gulf and their slip direction. This project has strong synergism with other NSF-funded large-scale projects such as EarthScope and MARGINS).