RUI Collaborative Research: Paleoearthquake History of the Garlock Fault

[706122] Rockwell这项研究将继续在加利福尼亚南部加洛克断层中心的一个地点进行古地震挖掘，该地点可能提供比迄今为止研究和发表的任何地点更长的史前地震记录。史前地震的长期记录对于确定沿断层的地震复发间隔的分布和对地震复发的物理模型施加约束是至关重要的。在之前的工作中，这些科学家表明，在过去的5145年里，中央加洛克断层产生了5-8次大地震，平均间隔为700-1230年。在初始海沟中暴露的地震放射性碳年龄表明，中央Garlock断裂的复发间隔是不规则的，地震可能在时间上是聚集的。这项研究将把地震记录扩展到10-15次大地震，并更好地记录所有事件的时间。这项研究是国家减少地震危害计划的一个组成部分。＊＊＊

9706122 Rockwell This research is to continue paleoseismic excavations at a site on the central Garlock fault in southern California that could potentially provide a longer record of prehistoric earthquakes than any site studied and published to date. A long record of prehistoric earthquakes is critical for determining the distribution of earthquake recurrence intervals along faults and for placing constraints on physical models of earthquake recurrence. In prior work, these scientists showed that the central Garlock fault has produced 5-8 large earthquakes in the past 5145 years, on average at intervals of 700-1230 years. The radiocarbon ages of earthquakes exposed in the initial trench indicate that the recurrence intervals for the central Garlock fault are irregular and that earthquakes may be clustered in time. This research will extend the earthquake record to 10-15 large earthquakes and better document the timing of all events. This research is a component of the National Earthquake Hazard Reduction Program. ***