This paper presents a joint analysis of instrumental and macroseismic data regarding the 19 July 2019, Greece M_w5.1 earthquake occurred west of Athens. This earthquake ruptured a blind, south-dipping normal fault, 23 km WNW of the center of Athens, while its relocated epicentre lies in close vicinity to the one of the 1999 M_w6.0 earthquake. The maximum macroseismic intensity of the 2019 mainshock reached IEMS98 = 7.5. Scarce damage and intensities up to 5–6 were reported in the epicentral area. Higher intensities were observed at larger distances, 12–15 km east and ESE of the epicentre, alongside the banks of Kifissos River, likely related to ground motion amplification due to soft alluvial formations. Similar selectivity of increased ground motions to the east of the epicentre with respect to other azimuths, also observed during the 1981 and 1999 earthquakes, supports eastward rupture directivity of the 2019 mainshock, an effect that is possibly common for the region’s fault system. Damping of seismic effects was observed east of Aegaleo Mountain, a structure suggested to impose a stopping phase in the time histories of the 1999 and 2019 earthquakes (Fig. A1).

本文介绍了有关2019年7月19日希腊雅典西部发生的M _w 5.1地震的仪器和宏观地震数据的联合分析。这次地震破裂盲，南倾的正断层，23公里WNW雅典的中心，而其拆迁震中位于比邻到1999年M的一个_{w ^}6.0级地震。2019年主震的最大宏观地震烈度达到IEMS98 = 7.5。据报道震中区域几乎没有破坏，强度高达5–6。在较远的距离上，东侧和震中中心的ESE以及Kifissos河两岸观察到更高的强度，这可能与软冲积层引起的地震动放大有关。在1981年和1999年地震期间也观察到，震中东部相对于其他方位角增加的地震动具有类似的选择性，这也支持了2019年大地震的东向破裂方向性，这种影响可能对该地区的断层系统很普遍。在Aegaleo山以东观察到了地震影响的衰减，该结构建议在1999年和2019年地震的时间历史中施加一个停止阶段（图A1）。