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。这次地震是由德纳利断层上的滑动引起的，该断层的大小与加利福尼亚州的圣安德烈亚斯断层相当。这次地震的震级，以及断层破裂的类型和震级都在圣安德烈亚斯断层上预期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重大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假设非常相似。目的是支持对地震破坏的快速反应勘察，以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、山体滑坡和地面破坏(如液化)相关的许多地表现象都是极易腐烂的。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，必须尽快开始收集信息；一旦春季天气允许，随后将进行额外的详细工作。调查结果将在加州大学伯克利分校地震工程研究中心的网页上公布，http://eerc.berkeley.edu/research/

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/