Investigations into the Mechanics of Faulting at Parkfield Integrating Coseismic Slip, Post-Seismic Deformation and Micro-Earthquake Behavior

该项目的研究人员正在研究圣安德烈亚斯断层帕克菲尔德部分的断层机制。他们的研究着眼于微震的尺度、微震与Mw6.0帕克菲尔德主震及其相关的震后滑动之间的关系、应力释放的非均质性、断层强度和断层流变学。他们将使用来自伯克利高分辨率钻孔地震台网和nsf资助的SAFOR试点和主要钻孔的数据。它们将产生这些小地震的运动破裂过程的高分辨率图像。这项研究的结果将直接关系到小地震的空间尺度、破裂和滑动速度、滑动和应力降的分布以及附近地震序列的触发等基本问题。研究这些小事件的一个优点是，它们的重现速度足够快，可以观察到许多周期。这样就有可能检查系统的可重复性。该项目将涉及研究生和本科生，利用地球望远镜的数据，可能有助于了解地震的发生，这对地震预测模型很有用。

The investigators on this project are studying the mechanics of faulting on the Parkfield segment of the San Andreas Fault. Their study looks into the scaling of micro-earthquakes, the relationships between micro-earthquakes and the Mw6.0 Parkfield mainshock and its associated postseismic slip, heterogeneity of stress release, fault strength, and fault rheology. They will use data from the Berkeley High Resolution Borehole Seismic Network and the NSF-funded SAFOR pilot and primary boreholes. They will produce high resolution images of the kinematic rupture processes of these small earthquakes. The results of this study will have direct bearing on fundamental questions concerning the spatial dimensions of small earthquakes, their rupture and slip velocities, the distribution of slip and stress drop and triggering of nearby sequences of earthquakes. An advantage of studying these small events is that recurrence is rapid enough that many cycles may be observed. Thus it will be possible to examine the repeatability of the system. The project will involve graduate and undergraduate students, take advantage of Earthscope data and may help understanding of earthquake occurrence that is useful for earthquake forecast models.