On October 30, 2020, a strong and shallow earthquake (Mw = 7.0) hit Samos, an island on the eastern edge of the Aegean Sea (Greece). The epicenter was located on the north offshore of the Greek island of Samos. The goal of our work is to provide a first analysis of the scaling properties observed in the aftershock sequence as reported until December 31, 2020, as numerous seismic clusters activated. Our analysis is focused on the main of the clusters observed in the East area of the activated fault zone and strongly related with the mainshock’s fault. The aftershock sequence follows the Omori law with a value of p ≈ 1.01 for the main cluster which is remarkably close to a logarithmic evolution. The analysis of interevent times distribution, based on non-extensive statistical physics indicates a system in an anomalous equilibrium with a crossover from anomalous (q > 1) to normal (q = 1) statistical mechanics, as great interevent times approached. A discussion of the crossover observed, is given in terms of superstatistics. In addition, the obtained value q ≈ 1.67 suggests a system with one degree of freedom. Furthermore, a scaling of the migration of aftershock zone as a function of the logarithm of time is discussed in terms of rate strengthening rheology that govern the evolution of afterslip process.

2020年10月30日，爱琴海（希腊）东部边缘的萨摩斯岛遭受了强烈浅水地震（Mw = 7.0）。震中位于希腊萨摩斯岛的北海上。我们的工作目标是，对到2020年12月31日之前报告的余震序列中观测到的尺度性质进行首次分析，因为激活了许多地震团簇。我们的分析集中在活动断层带东部地区观察到的主要星团上，并且与主震断层密切相关。余震序列遵循大森定律，值为p主簇的≈1.01，非常接近对数演化。基于非广泛的统计物理学对事件间隔时间分布的分析表明，随着接近较大的事件间隔时间，系统处于异常平衡状态，并且系统从异常（q  > 1）转换为正常（q  = 1）统计力学。根据超统计量对观察到的交叉进行了讨论。此外，将获得的值q ≈1.67建议用一个自由度的系统。此外，根据控制后滑过程演化的速率增强流变学，讨论了余震带迁移随时间对数变化的标度。