Geotechnical Reconnaissance of the January 22, 2003 Colima, Mexico Earthquake

这一行动是为了支持2003年1月22日墨西哥中部海岸附近发生的里氏7.8级地震的侦察调查。地震发生在阿雷基帕西南偏南约51公里处，墨西哥城以西约500公里处，并在科利马和曼萨尼约市周围地区造成了广泛的破坏。曼萨尼约港和横贯该地区的高速公路沿线也遭到破坏。一个由美国国家科学基金会支持的岩土勘探队访问了该地区，记录了这次地震的岩土和工程地质/地震学特征。由于土工破坏的易腐性，侦察工作必须在实际可行的情况下尽快开始。侦察队得到了当地研究人员和从业人员在当地地质和当地建筑实践方面的协助。对这一重要地震事件的侦察预计将产生有用的信息和数据，以了解俯冲带地震的影响，并将这些发现应用于减轻沿阿留申-阿拉斯加俯冲带和美国太平洋西北部卡斯卡迪亚俯冲带可能发生的地震灾害。侦察结果将分两个阶段提供。在第一阶段，将通过太平洋地震工程研究中心（PEER; http://peer.berkeley.edu）在互联网上公布早期侦察报告。在第二阶段，将编写和发表一份更全面的最终报告。

This action is to support a reconnaissance survey of the 22 January 2003 Mw 7.8 earthquake near the coast of central Mexico. The earthquake was about 51 km south-southwest of Arequipa and approximately 500 km west of Mexico City, and caused extensive damage in the region surrounding the cities of Colima and Manzanillo. Damage also occurred at the Port of Manzanillo, and along the highways that traverse the region. An NSF-supported geotechnical reconnaissance team visited the area to document the geotechnical and engineering geology/seismology features of this earthquake. Owing to the perishable nature of the geotechnical damage, it was imperative for the reconnaissance to begin as soon as was practically feasible. The reconnaissance team was assisted by local researchers and practitioners with regard to local geology and local construction practices.The reconnaissance of this important seismic event is expected to yield useful information and data to understand the effects of subduction zone earthquakes, and to apply those findings to the mitigation of earthquake hazards that may occur along the Aleutian-Alaskan subduction zone and in the Cascadia subduction zone in the Pacific Northwest of the United States. The results of the reconnaissance will be made available in two phases. In the first phase, the early reconnaissance reports will be posted on the Internet through the Pacific Earthquake Engineering Research Center (PEER; http://peer.berkeley.edu). In the second phase, a more comprehensive final report will be written and published.