Inversion von Momententensoren in anisotropen Medien mit Anwendung auf Schwarmereignisse in der Vogtland Region

目前的矩张量反演方案是基于这样的假设，即源所在的介质是各向同性的。然而，从Vogtland地区的地震记录的loval相位显示出显着的剪切波分裂，从而清楚地表明在源区域的各向异性。利用各向异性介质的全波正演模拟结果，我们将研究各向异性对确定运动学和动力学震源参数（如断裂面和应力降）的影响。我们将进一步实现各向异性矩张量反演方案使用全波各向异性绿色的功能和/或高频近似。反演方案将被应用于2000年在Vogtland地区的地震群的数据。这一结果将对流体在所观测到的震群发生中的可能作用提出限制。

Current moment-tensor inversion schemes are based on the assumption that the medium within which the source is located is isotropic. However, loval phases recorded from earthquakes in the Vogtland region show significant shear-wave-splitting, thus clearly indicating anisotropy in the source region. Using results of full-wave forward modeling for anisotropic media, we will investigate effects of anisotropy for the determination of kinematic and dynamic source parameters (such as fracture surface and stress drop). We will further implement an anisotropic moment-tensor inversion scheme using full-wave anisotropic Green's functions and/or a high-frequency approximation. The inversion scheme will be applied to the data from the earthquake swarm of the year 2000 in the Vogtland region. The results will put constraints on the possible role of fluids in the occurence of the observed earthquake swarm.