Holocene Seismicity of the Cascadia Subduction Zone Based on Precise Dating of the Turbidite Event Record

[803018 .金指]卡斯卡迪亚活动构造的一个主要问题是地震周期。总的来说，它被认为是一个安静的地带，很少有活跃的地震活动。然而，地貌学研究现在表明，地震，可能是大震级，发生在过去的一万年。它们的大小和分布还有待探索。该项目将分析和确定卡斯卡迪亚海岸沉积浊度的年代。如果它们能够在大范围内同步显示，那么它们可能有一个共同的触发器。在区域范围内，最可能的触发因素是大地震。因此，这项研究如果成功，将极大地有助于我们了解卡斯卡迪亚地震的大小和频率，那里的现代地震敏感度不是很明显。从本研究中得出的沿着整个收敛边缘的应变的性质和分配将有助于理解变形分配和地震与地震变形。

9803018Goldfinger A major concern of the active tectonics of Cascadia is that of the earthquake cycle. In general it is considered a quiet zone, with little active seismicity. However, geomorphic studies are now showing that earthquakes, probably of large magnitude, have occurred in the last 10,000 years. Their magnitude and distribution are yet to be explored. The project will analyze and date the sedimentary turbidities of the coast of Cascadia. If they can be shown to synchronous over a wide area, then it follows that they may have had a common trigger. The most likely tigger on a regional scale is a large earthquake. Thus this study, if successful, will contribute greatly to our understanding of the size and frequency of earthquakes in Cascadia, where the modern sesmicity is not very revealing. The nature and partition of strain along the entire convergent margin that will emerge from this study will aid in the understanding of deformation partitioning and seismic versus aseismic deformation.