EAR-PF Late Quaternary slip rates and paleoseismicity of the Sevier Desert Detachment: earthquake hazards of a low-angle normal fault

蒂莫西斯塔尔博士已被授予美国国家科学基金会博士后奖学金，通过密歇根大学进行研究和实地教育计划。他将调查塞维尔沙漠支队（SDD）的古地震活动性和地震发生的潜力-一个低角度的正断层（LANF）在犹他州中部。该项目的目标是：（1）确定SDD的长期滑动速率;（2）确定SDD上过去地震的时间和震级;（3）模拟SDD上多段或多断层破裂的概率以及断层在深度上延伸的概率。斯塔尔博士将使用野外测绘、地面激光扫描、宇宙成因地表地震年龄测定、古地震槽探和数值模拟相结合的方法来实现上述研究目标。这是第一次研究LANF上史前地震发生时间和震级的野外证据。这项研究将阐明这些断层在美国和世界范围内造成的有争议和潜在破坏性的地震危险。该奖学金支持美国大学本科生开展基于实地的合作研究项目。密歇根大学和斯诺学院，一所位于犹他州中部的两年制本科学院。斯塔尔博士还将领导一个为期一个月的实地考察营。密歇根大学的学生在新西兰，他的博士研究的东道国，旨在扩大世界各地不同的构造环境的知识，并建立美国和新西兰本科生之间的国际联系。

Dr. Timothy Stahl has been awarded an NSF EAR Postdoctoral Fellowship to conduct a research and field-based education program through the University of Michigan. He will investigate the paleoseismicity and seismogenic potential of the Sevier Desert Detachment (SDD)- a low-angle normal fault (LANF) in central Utah. This project aims to (1) establish the long-term slip rates of the SDD; (2) determine the timing and magnitude of past earthquakes on the SDD; (3) model the probability of multi-segment or multi-fault ruptures on the SDD and faults soling into it at depth. Dr. Stahl will use a combination of field mapping, terrestrial laser scanning, cosmogenic surface exposure-age dating, paleoseismic trenching, and numerical modeling to meet the above research aims.This is the first study to examine field evidence for the timing and magnitude of prehistoric earthquakes on a LANF. The research will elucidate the controversial and potentially devastating seismic hazard posed by these faults in the US and worldwide. The fellowship supports the development of field-based, collaborative research projects for undergraduates at the U. Michigan and Snow College, a two-year undergraduate college in central Utah. Dr. Stahl will also lead a one-month field camp for U. Michigan students in New Zealand, the host country of his PhD studies, aimed at broadening knowledge of different tectonic settings around the world and establishing international connections between USA and New Zealand undergraduate students.