The intraplate and interplate seismic catalogues of Iquique (Chile) area were investigated by using seismological (b value of the Gutenberg–Richter law), fractal (Allan Factor and detrended fluctuation analysis) and topological (Horizontal Visibility Graph) methods. The two catalogues show different stress state indicated by the different b value, larger for the intraplate seismicity. The interplate seismicity shows significant time-clustering behavior of the earthquake occurrence times at large time scales, while the time distribution of the intraplate earthquakes seems to be featured by random fluctuations without any significant sign of time-clustering. Different role seems to be played by aftershocks in the two investigated seismic zones, revealed by the different time distribution of the aftershock-depleted catalogue of the intraplate zone, which remains Poissonian for most of the time scales, and the interplate zone that still keeps its clustering phenomenon but at higher timescales, thus shortening its clustering time scale range. Furthermore, the interevent times of the interplate catalogue are characterized by persistent dynamics even after removing the aftershocks, while uncorrelated fluctuations characterize the behavior of interevent intervals of the whole as well as aftershock-depleted intraplate catalogue. Additionally, the magnitudes of both catalogues are characterized by time-reversibility before and after the aftershock removal; while the interevent times of intraplate catalogue change their status from time-irreversibility to time-reversibility after removing the aftershocks. The obtained results seem to evidence a different role played by the aftershocks in the intraplate and interplate zones, that needs to be further explored.

中文翻译：

---

板内与板间地震的时间动力学特征分析：以伊基克地区（智利）为例

使用地震学（古腾堡-里希特定律的 b 值）、分形（艾伦因子和去趋势波动分析）和拓扑（水平能见度图）方法研究了伊基克（智利）地区的板内和板间地震目录。两个目录显示不同的应力状态，由不同的 b 值表示，对于板内地震活动较大。板间地震活动在大时间尺度上表现出显着的地震发生时间的时间聚类行为，而板内地震的时间分布似乎具有随机波动的特点，没有任何明显的时间聚类迹象。板内带余震消减目录的不同时间分布揭示了两个被调查地震带的余震似乎发挥了不同的作用，大部分时间尺度上仍保持泊松分布，而板间带仍保持其聚类现象，但在更高的时间尺度上，从而缩短了其聚类时间尺度范围。此外，即使在去除余震后，板间目录的事件间时间也具有持续动力学的特征，而不相关的波动表征了整个事件间间隔以及余震耗尽的板内目录的行为。此外，两个目录的震级都具有余震消除前后的时间可逆性；而板内目录的事件间时间在去除余震后由时间不可逆变为时间可逆。