Abstract High-frequency seismic signals are generated during landslides and can be analyzed to obtain detailed information regarding landslide dynamics. However, a better understanding of the physical process that produces such high-frequency signals is required. The two massive landslides that occurred on April 11, 2013 in the Bingham Canyon Mine pit (Utah, USA) generated low- and high-frequency seismic signals. Using the low-frequency signals, we inverted the force-time functions of the two events and estimated their dynamics. We used the signals generated by the two events and filtered in three frequency bands to obtain the source discrepancies between the two events. By analyzing these source discrepancies, we found that the low- and medium-frequency signals were generated due to the bulk movement of sliding material. Furthermore, the medium-frequency signals contained information regarding small-particle impacts along the sliding path. The high-frequency (1–3 Hz) signals are controlled by small-scale process of sliding materials, and are sum of stochastic phenomena. This clarification of the source of the high-frequency signals is expected to improve the analyses of seismic signals generated during landslides.

中文翻译：

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利用两个滑坡之间的震源差异分析滑坡期间产生的高频地震信号

摘要 滑坡过程中会产生高频地震信号，可对其进行分析以获得有关滑坡动力学的详细信息。然而，需要更好地理解产生这种高频信号的物理过程。2013 年 4 月 11 日在宾厄姆峡谷矿坑（美国犹他州）发生的两次大规模滑坡产生了低频和高频地震信号。使用低频信号，我们反转了两个事件的力-时间函数并估计了它们的动力学。我们使用由两个事件产生的信号并在三个频带中进行滤波来获得两个事件之间的源差异。通过分析这些源差异，我们发现低频和中频信号是由于滑动材料的整体运动而产生的。此外，中频信号包含有关沿滑动路径的小颗粒撞击的信息。高频（1-3Hz）信号受滑动材料的小尺度过程控制，是随机现象的总和。高频信号源的这种澄清有望改进对滑坡期间产生的地震信号的分析。