Imaging of small-scale structures and time-dependent changes in the rupture area of the 2010 Maule earthquake

摘要文件中描述了整个本德兰特拉格的总体目标。在这个项目中，我们将应用有针对性的地震学技术来成像板块界面，即俯冲通道及其邻近环境。利用2010年穆勒8.8级地震余震序列的当地地震台网记录，我们将通过反射波或转换波的偏移和波形模拟绘制地震间断图，以寻找板块界面以及大洋和大陆地壳几何和性质发生小尺度变化的证据。我们还将应用一种基于事件簇的方法，允许在实际现场确定对流体存在特别有诊断作用的Vp/vs/，并且在提供预期的聚集地震活动丰富的情况下，也具有高时间分辨率。特别是，我们想知道瞬时的、可能是流体驱动的过程在多大程度上控制着地震后的即刻和长期的演化，以及板块界面的地形或俯冲通道的弹性性质的变化是否与震前锁定、同震和震后滑动模式的变化相关。

The overarching aims of the entire Bündelantrag have been described in the summary document. In this project we will apply targeted seismological techniques to image the plate interface, i.e., the subduction channel and its immediate surroundings. Using local seismic network recordings of the aftershock sequence of the Mw=8.8 Maule earthquake of 2010, we will map seismic discontinuities using migration and waveform modelling of reflected or converted waves in order to find evidence of small scale variations in the geometry and properties of the plate interface and oceanic and continental crust. We will also apply an event cluster based method that allows determining Vp/Vs/, which is particularly diagnostic to the presence of fluids, practically in situ and, provided the expected abundance of clustered seismicity, also with high temporal resolution. In particular we would like to know in how far transient, possibly fluid driven processes control the immediate and longer-term postseismic evolution and if variations in the topography of the plate interface or the elastic properties of the subduction channel can be correlated with variations in pre-seismic locking and co-seismic and post-seismic slip pattern.