Unraveling landslide failure mechanisms with seismic  signal analysis for enhanced pre-survey understanding

Chang, Jui-Ming; Yang, Che-Ming; Chao, Wei-An; Ku, Chin-Shang; Huang, Ming-Wan; Hsieh, Tung-Chou; Hung, Chi-Yao

doi:https://doi.org/10.5194/nhess-25-451-2025

Articles | Volume 25, issue 2

https://doi.org/10.5194/nhess-25-451-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/nhess-25-451-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 2

Research article

|

03 Feb 2025

Research article |

| 03 Feb 2025

Unraveling landslide failure mechanisms with seismic signal analysis for enhanced pre-survey understanding

Jui-Ming Chang, Che-Ming Yang, Wei-An Chao, Chin-Shang Ku, Ming-Wan Huang, Tung-Chou Hsieh, and Chi-Yao Hung

Supplement

https://doi.org/10.5194/nhess-25-451-2025-supplement

Data sets

Broadband Array in Taiwan for Seismology IESAS - Institute of Earth Sciences, Academia Sinica https://doi.org/10.7914/SN/TW

Central Weather Administration Seismographic Network Central Weather Administration https://doi.org/10.7914/SN/T5

Seismic signal for Cilan landslide Jui-Ming Chang https://doi.org/10.6084/m9.figshare.24464281.v1

The 20 digital terrain model (DTM) of the 20 m resolution in Taiwan Ministry of the Interior https://data.gov.tw/dataset/35430

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Short summary

The study on the Cilan landslide (CL) demonstrates the utilization of seismic analysis results as preliminary data for geologists during field surveys. Spectrograms revealed that the first event of CL consisted of four sliding failures accompanied by a gradual reduction in landslide volume. The second and third events were minor toppling and rockfalls. Then combining the seismological-based knowledge and field survey results, the spatiotemporal variation in landslide evolution is proposed.