The type of collision between the European and the Adriatic plates in the easternmost Alps is one of the most interesting questions regarding the Alpine evolution. Tectonic processes such as compression, escape and uplift are interconnected and shape this area. We can understand these ongoing processes better, if we look for signs of the deformation within the Earth's deep crust of the region. By collecting records from permanent and temporary seismic networks, we assemble a receiver function dataset, and analyze it with the aim of giving new insights on the structure of the lower crust and of the shallow portion of the upper mantle, which are inaccessible to direct observation. Imaging is accomplished by performing common conversion depth stacks along three profiles that crosscut the Eastern Alpine orogen, and allow isolating features consistently persistent in the area. The study shows a moderately flat Moho underlying a seismically anisotropic middle-lower crust from the Southern Alps to the Austroalpine nappes. The spatial progression of anisotropic axes reflects the orientation of the relative motion and of the stress field detected at the surface. These observations suggest that distributed deformation is due to the effect of the Alpine indentation. In the shallow upper mantle right below the Moho interface, a further anisotropic layer is recognized, extended from the Bohemian Massif to the Northern Calcareous Alps.

中文翻译：

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阿尔卑斯山凹痕的地震特征，来自东阿尔卑斯山的证据

阿尔卑斯山脉最东端的欧洲板块和亚得里亚海板块之间的碰撞类型是有关阿尔卑斯山演化的最有趣的问题之一。挤压、逃逸和抬升等构造过程相互关联并塑造了该区域。如果我们在该地区地壳深处寻找变形的迹象，我们就能更好地理解这些正在进行的过程。通过从永久和临时地震网络收集记录，我们组装了一个接收函数数据集，并对其进行分析，目的是对下地壳和上地幔浅层部分的结构提供新的见解，这些结构无法直接观测. 成像是通过沿着横切东部高山造山带的三个剖面执行公共转换深度叠加来完成的，并允许隔离特征在该区域内持续存在。该研究显示，在从南阿尔卑斯山到南阿尔卑斯山脉的中下地壳地震各向异性下有一个中等平坦的莫霍面。各向异性轴的空间进展反映了相对运动的方向和在表面检测到的应力场的方向。这些观察结果表明分布变形是由于高山压痕的影响。在莫霍面界面正下方的浅上地幔中，发现了一个进一步的各向异性层，从波西米亚地块延伸到北钙质阿尔卑斯山。各向异性轴的空间进展反映了相对运动的方向和在表面检测到的应力场的方向。这些观察结果表明分布变形是由于高山压痕的影响。在莫霍面界面正下方的浅上地幔中，发现了一个进一步的各向异性层，从波西米亚地块延伸到北钙质阿尔卑斯山。各向异性轴的空间进展反映了相对运动的方向和在表面检测到的应力场的方向。这些观察结果表明分布变形是由于高山压痕的影响。在莫霍面界面正下方的浅上地幔中，发现了一个进一步的各向异性层，从波西米亚地块延伸到北钙质阿尔卑斯山。