SGER: Geotechnical Reconnaissance of the 3 November 2002, Mw 7.9, Denali- Earthquake, Alaska

2002年11月3日，阿拉斯加中部发生7.9级地震。这次地震是由德纳里断层的滑动引起的，德纳里断层的大小与加州的圣安德烈亚斯断层相当。地震的震级、断层破裂的类型和震级都在圣安德烈亚斯断层预计发生的最大可信地震的范围内。因此，这次地震提供了一个独特的机会来研究主要走滑断层破裂的岩土工程效应，其特征与圣安德烈亚斯断层的特征非常相似。目的是支持对地震破坏进行快速反应侦察，以便记录这次大地震的岩土和工程地质特征。大地震的经验表明，与断层、山体滑坡和地面塌陷（如液化）有关的许多地表现象都是高度易腐的。在这种情况下，冬季的到来将迅速掩盖许多地表特征，春季融雪将进一步掩盖大部分地表暴露。因此，有必要尽早安排信息收集工作；一旦春天天气允许，就会进行更多的详细工作。调查结果已在加州大学伯克利分校地震工程研究中心的网页http://eerc.berkeley.edu/research/上公布

A magnitude 7.9 earthquake struck central Alaska on 3 November 2002. The earthquake resulted from slip on the Denali fault that is comparable in size to California's San Andreas Fault. The magnitude of the earthquake, and the type and magnitude of the fault rupture are within the range of a maximum credible earthquake that would be expected on the San Andreas Fault. Thus, this earthquake provides a unique opportunity to study the geotechnical effects of a major strike slip fault rupture with characteristics very similar to those assumed for the San Andreas Fault.The objective is to support a rapid-response reconnaissance of the earthquake damage in order to document the geotechnical and engineering geologic features of this major earthquake. Experience with major earthquakes shows that much of the surface phenomena associated with faulting, landslides, and ground failure such as liquefaction is highly perishable. In this case, the onset of winter will rapidly obscure many of the surficial features, and spring snowmelt will further obscure most of the surface exposures. Therefore, it is essential that collection of information commence as soon as can be arranged; to be followed by additional detailed work once the weather permits in the spring.The results of the survey are being made available on the web page of the Earthquake Engineering Research Center at the University of California, Berkeley,http://eerc.berkeley.edu/research/