Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy.
Istituto Nazionale di Geofisica e Vulcanologia, Catania, Italy.
Sci Data. 2020 Feb 7;7(1):42. doi: 10.1038/s41597-020-0383-0.
We provide a database of the surface ruptures produced by the 26 December 2018 Mw 4.9 earthquake that struck the eastern flank of Mt. Etna volcano in Sicily (southern Italy). Despite its relatively small magnitude, this shallow earthquake caused about 8 km of surface faulting, along the trace of the NNW-trending active Fiandaca Fault. Detailed field surveys have been performed in the epicentral area to map the ruptures and to characterize their kinematics. The surface ruptures show a dominant right-oblique sense of displacement with an average slip of about 0.09 m and a maximum value of 0.35 m. We have parsed and organized all observations in a concise database, with 932 homogeneous georeferenced records. The Fiandaca Fault is part of the complex active Timpe faults system affecting the eastern flank of Etna, and its seismic history indicates a prominent surface-faulting potential. Therefore, this database is essential for unravelling the seismotectonics of shallow earthquakes in volcanic areas, and contributes updating empirical scaling regressions that relate magnitude and extent of surface faulting.
我们提供了 2018 年 12 月 26 日发生在西西里岛（意大利南部）埃特纳火山东侧的 4.9 级地震产生的地表破裂数据库。尽管这次浅层地震的震级相对较小，但它在北北西走向的活动菲安达卡断层上造成了约 8 公里的地表断裂。在震中地区进行了详细的野外调查，以绘制断裂带并描述其运动学特征。地表破裂显示出以右旋走滑为主的运动特征，平均滑移约为 0.09 米，最大值为 0.35 米。我们已经将所有观测结果解析并组织到一个简明的数据库中，其中包含 932 个具有地理位置的同质记录。菲安达卡断层是影响埃特纳火山东侧的复杂蒂姆佩断层系统的一部分，其地震历史表明具有显著的地表断裂潜力。因此，这个数据库对于揭示火山地区浅层地震的地震构造至关重要，并为相关经验性标度回归提供了更新，这些回归关系到地震的震级和地表断裂的范围。
