Zaccagnino Davide, Telesca Luciano, Doglioni Carlo
Sapienza University, Earth Sciences Department, Rome, 00185, Italy.
Institute of Methodologies for Environmental Analysis, National Research Council (CNR-IMAA), Tito Scalo (PZ), 85050, Italy.
Sci Rep. 2022 May 2;12(1):7109. doi: 10.1038/s41598-022-11328-z.
Faults become more and more responsive to stress perturbations as instability mounts. We utilize this property in order to identify the different phases of the seismic cycle. Our analysis provides new insights about the features of impending mainshocks, which are proposed to emerge from a large-scale crustal-weakening preparation process whose duration depends on their seismic moments, according to the power-law T [Formula: see text] M[Formula: see text] for M[Formula: see text] [Formula: see text] 10[Formula: see text] N m. Moreover, further studies are performed about the impact of tidal stress perturbation on seismicity; in particular, the relationship between frequency-magnitude scaling and perturbations is discussed, showing that the sensitivity of earthquakes to solid Earth tides decreases as their magnitudes increase.
随着不稳定性增加，断层对应力扰动的响应越来越明显。我们利用这一特性来识别地震周期的不同阶段。我们的分析为即将发生的主震特征提供了新的见解，根据幂律T [公式：见正文] M[公式：见正文]（对于M[公式：见正文] [公式：见正文] 10[公式：见正文] N m），这些主震被认为源自一个持续时间取决于其地震矩的大规模地壳弱化准备过程。此外，还对潮汐应力扰动对地震活动的影响进行了进一步研究；特别是讨论了频率-震级标度与扰动之间的关系，结果表明地震对固体地球潮汐的敏感性随着震级的增加而降低。
