With the strong 26 November 2019 earthquake that struck western Albania, several buildings collapsed, causing 51 casualties, mainly in the areas of Durrës and Thumanë. The destruction is attributed to several factors, including strong ground motion (⁠maximum peak ground acceleration=192 cm/s2 in Durrës), soil liquefaction, site amplification, poor building workmanship and construction quality, aging of building materials, impact on buildings of the strong 21 September 2019 Mw 5.6 foreshock, and pre‐existing stress on buildings sustaining differential displacements because of soft soil conditions in their foundations. In both areas, we estimated maximum seismic intensity of VIII–IX (modified Mercalli intensity and European Macroseismic Scale 1998 scales). Fault‐plane solutions indicated reverse faulting striking northwest–southeast. From regional tectonics, we assumed that the causal fault dips to east‐northeast, implying that the affected area is situated at the hanging wall domain of the causative fault. Using the Non‐Linear Location program algorithm and ak135 velocity model and 71 P and S phases, we manually located the mainshock hypocenter offshore, at distance of ∼17 km from Durrës and at depth of ∼22 km⁠. Adopting this solution, a finite‐fault model of space–time seismic slip was developed from the inversion of teleseismic P waveforms. Strike 345°, dip 22°, rupture velocity 2.6 km/s⁠, and total rupture duration ∼16 s fit the data. The rupture was complex, showing one main patch at the south and a second at the north with maximum slips of ∼1.5 and ∼1 m⁠, respectively. The rake vector at the main slip area was 99°, indicating that the thrust‐type component played the most important role in the rupture process. The total seismic moment released was estimated at Mo=5.0×1018 N·m corresponding to Mw 6.4.

中文翻译：

---

2019年11月26日Mw 6.4阿尔巴尼亚破坏性地震

随着2019年11月26日强烈地震袭击了阿尔巴尼亚西部，几栋建筑物倒塌，造成51人伤亡，主要在都拉斯和图曼拉地区。破坏归因于以下几个因素，包括强烈的地面运动（Durrës的最大地面峰值加速度= 192 cm / s2），土壤液化，场地放大，建筑工艺和建筑质量差，建筑材料的老化，对建筑的影响。 2019年9月21日强劲的5.6级前兆，并且由于地基中的软土条件，建筑物承受着不同位移的既有应力。在这两个区域中，我们估计了最大地震烈度为VIII–IX（修正的Mercalli烈度和1998年欧洲宏观地震标度）。断层平面解法表明逆断层撞击西北-东南。从区域构造学上，我们假设因果断层向东东北倾斜，这意味着受影响区域位于因果断层的上盘域。使用非线性定位程序算法和ak135速度模型以及71个P相和S相，我们将主震震中点手动定位在离Durrsës约17 km处，约22km⁠处的近海处。采用这种解决方案，从远震P波形的反演发展了时空地震滑动的有限故障模型。打击345°，倾角22°，破裂速度2.6 km / s，总破裂持续时间约16 s。破裂很复杂，在南部显示一个主斑块，在北部显示第二个斑块，最大滑移分别为〜1.5和〜1m⁠。主滑移区域的前角矢量为99°​​，表明推力型分量在破裂过程中起着最重要的作用。释放的总地震矩估计为Mo = 5.0×1018 N·m，对应于Mw 6.4。