Correlation between Earth tides and the 2008 MS 8.0 Wenchuan earthquake sequence
Correlation between Earth tides and the 2008 MS 8.0 Wenchuan earthquake sequence
复制标题
地球潮与2008年汶川8.0级地震序列的相关性
作者：
Ruyu Yan;Chaodi Xie;Xinglin Lei;Han Zhang;Rui Jia;Jianping Liao
本研究探讨了 2008 年 5 月 12 日汶川 8.0 级地震余震序列中潮汐触发的可能性。使用舒斯特谱和 KORRECT（矩形脉冲相关）法两种方法来探索余震序列的周期性。首先，我们通过舒斯特谱法检测了潜在的周期性；然后，我们使用 KORRECT 方法来验证和确认这些周期性。此外，利用16 km震源深度将余震目录分为两个子集，讨论震源深度对潮汐触发的影响。结果表明，主震后最初几天的余震主要由半日潮和日潮引发。龙门山冲断带浅源地震由日潮引发，深源地震由半日潮引发。
This study examines the possibility of tidal triggering in the aftershock sequence of the MS 8.0 Wenchuan earthquake on 12 May 2008. Two methods, the Schuster spectrum and KORRECT (correlation with a rectangular pulse) methods, were used to explore the periodicities of the aftershock sequence. Firstly, we detected the latent periodicities through the Schuster spectrum method; then, we used the KORRECT method to verify and confirm these periodicities. Moreover, the aftershock catalogue was divided into two subsets using 16 km focal depth to discuss the impact of focal depth on tidal triggering. Results show that the aftershocks in the first few days following the mainshock were mainly triggered by semidiurnal and diurnal tides. In the Longmen Shan thrust belt, shallow earthquakes were triggered by diurnal tides, and deep earthquakes were triggered by semidiurnal tides.