In 2016–2017, a destructive sequence of earthquakes affected a wide portion of Central Italy, activating a complex, 80-km long system of SW-dipping normal faults and causing impressive surface faulting and widespread damage. Former studies providing reconstructions of the fault systems activated during this sequence, are mostly based on high-resolution seismological and geodetic data. In this paper, we integrate surface and subsurface geological data with the ones obtained by an irregular network of seismic reflection profiles, aimed at providing a comprehensive reconstruction of the subsurface lithologies and structures in this area. We have constructed a set of five geological cross-sections, passing through the mainshock epicentral areas (Mw > 5.5) of the seismic sequence. The cross-sections are extrapolated down to a depth of ca. 12 km, along which we have plotted relocated seismicity. Combined geological and seismological data support a new 3D seismotectonic model, illustrating the propagation through time and space of the seismic ruptures during the sequence. Our results show that the litho-mechanical stratigraphy exerted a primary control on the distribution of seismicity, as it is mostly hosted in the more competent lithologies (i.e. the Late Triassic-Paleogene succession, consisting of carbonates and evaporites). In addition, we illustrate the crucial role played by the inherited compressional structures in determining the lateral and vertical variations of the rheological properties of the upper crust and, eventually, the overall geometry and segmentation of the seismogenic extensional system. The workflow proposed here can be applied to other seismogenic zones throughout the world, since reliable seismotectonic models require an accurate reconstruction of the subsurface geological setting, based on a close integration of geological, geophysical and seismological data.

2016-2017年，一系列破坏性地震袭击了意大利中部大部分地区，引发了一个复杂的，长达80公里的西南向倾斜正常断层系统，造成了令人印象深刻的地面断层和广泛的破坏。以前的研究提供了在此序列期间激活的断裂系统的重建，这些研究主要是基于高分辨率的地震和大地测量数据。在本文中，我们将地表和地下地质数据与通过不规则地震反射剖面网络获得的数据进行了整合，目的是对该地区的地下岩性和结构进行全面的重建。我们通过地震序列的主震震中区（Mw> 5.5）构造了一组五个地质剖面。横截面外推到大约深度。12公里 沿着它我们绘制了重新定位的地震活动图。组合的地质和地震数据支持新的3D地震构造模型，该图说明了地震序列在时间和空间上的传播。我们的研究结果表明，岩石力学地层学对地震活动性分布起了主要控制作用，因为它主要集中在更称职的岩性中（即由碳酸盐岩和蒸发岩组成的晚三叠世-古近纪演替）。此外，我们说明了继承的压缩结构在确定上地壳流变特性的横向和垂直变化以及最终确定地震发生伸展系统的整体几何形状和分段方面所起的关键作用。