Earthquake Sequence Dynamics at the Interface Between an Elastic Layer and Underlying Half-Space in Antiplane Shear

Abstract: We quantify sliding stability and rupture styles for a horizontal interface between an elastic layer and stiffer elastic half-space with a free surface on top and rate-and-state friction on the interface. Specific motivation (and model parameters) comes from quasi-periodic slow slip events on the Whillans Ice Plain in West Antarctica. We quantify the influence of layer thickness on sliding stability, specifically whether steady loading of the system produces steady sliding or sequences of stick-slip events. This dataset contains input files from different parts of parameter space to demonstrate different styles of slip (steady sliding, slow slip sequences, and fast slip sequences).

摘要：本研究针对顶部带有自由表面的弹性层与刚度更高的弹性半空间之间的水平界面，以及该界面处的速率-状态摩擦（rate-and-state friction），量化了其滑动稳定性与破裂模式。本研究的具体研究动机（以及模型参数）源自南极西部惠兰斯冰原（Whillans Ice Plain）上观测到的准周期慢滑事件。我们量化了弹性层厚度对滑动稳定性的影响，具体考察系统在稳态加载下会产生稳态滑动，还是一系列粘滑事件。本数据集包含参数空间不同区域对应的输入文件，用以展示三类滑移模式：稳态滑动、慢滑事件序列与快滑事件序列。