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<p>This study examines the catastrophic Jiweishan rockslide that occurred in Wulong County, Chongqing, China, in 2009. By integrating broadband seismic records, high-resolution topographic data, and three-component source force inversion, we reconstruct the event’s dynamic evolution and assess its interaction with terrain conditions. The landslide-generated seismic signals are characterized by low-frequency (1–5 Hz) surface waves, long durations, and poorly defined phases, which clearly distinguish them from tectonic earthquakes. Spectral and Arias intensity analyses reveal a multi-phase energy release process. Inversion of waveforms from 11 broadband stations yields source time functions that document three distinct stages: initial northward acceleration, eastward deflection accompanied by strong collisions, and final deposition marked by rapidly decaying forces. The estimated peak velocity (∼38 m/s) and cumulative displacement (∼600 m) correspond closely with geomorphic evidence, supporting the robustness of the inversion. Reconstructed trajectories demonstrate that topographic confinement exerted primary control over motion direction, energy dissipation, and deposition patterns. These results refine previous applications of seismic inversion by providing a detailed three-dimensional reconstruction of landslide kinematics and terrain coupling. More broadly, the study highlights the potential of integrating seismic inversion with DEM analysis and particle dynamics modeling to achieve high-resolution characterization of rapid landslide processes, offering a valuable framework for hazard assessment in complex mountainous regions.</p>

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Dynamic Characterization of the 2009 Jiweishan Rockslidein Wulong, China, Based on Broadband Seismic Observations

  • 期刊论文

  • 发表日期：

    2025年12月3日

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  • Kai Chen,
  • Meng Zhang,
  • Man-qiu He,
  • Jiang Yi,
  • Tong-jun Wang

摘要

This study examines the catastrophic Jiweishan rockslide that occurred in Wulong County, Chongqing, China, in 2009. By integrating broadband seismic records, high-resolution topographic data, and three-component source force inversion, we reconstruct the event’s dynamic evolution and assess its interaction with terrain conditions. The landslide-generated seismic signals are characterized by low-frequency (1–5 Hz) surface waves, long durations, and poorly defined phases, which clearly distinguish them from tectonic earthquakes. Spectral and Arias intensity analyses reveal a multi-phase energy release process. Inversion of waveforms from 11 broadband stations yields source time functions that document three distinct stages: initial northward acceleration, eastward deflection accompanied by strong collisions, and final deposition marked by rapidly decaying forces. The estimated peak velocity (∼38 m/s) and cumulative displacement (∼600 m) correspond closely with geomorphic evidence, supporting the robustness of the inversion. Reconstructed trajectories demonstrate that topographic confinement exerted primary control over motion direction, energy dissipation, and deposition patterns. These results refine previous applications of seismic inversion by providing a detailed three-dimensional reconstruction of landslide kinematics and terrain coupling. More broadly, the study highlights the potential of integrating seismic inversion with DEM analysis and particle dynamics modeling to achieve high-resolution characterization of rapid landslide processes, offering a valuable framework for hazard assessment in complex mountainous regions.