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Rain and small earthquakes maintain a slow-moving landslide in a persistent critical state

Author

Listed:
  • Noélie Bontemps

    (Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre)

  • Pascal Lacroix

    (Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre)

  • Eric Larose

    (Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre)

  • Jorge Jara

    (École Normale Supérieure, CNRS, UMR 8538, PSL Research University)

  • Edu Taipe

    (OVI-INGEMMET)

Abstract

In tectonically active mountain belts, landslides contribute significantly to erosion. Statistical analysis of regional inventories of earthquake-triggered-landslides after large earthquakes (Mw > 5.5) reveal a complex interaction between seismic shaking, landslide material, and rainfall. However, the contributions of each component have never been quantified due to a lack of in-situ data for active landslides. We exploited a 3-year geodetic and seismic dataset for a slow-moving landslide in Peru affected by local earthquakes and seasonal rainfalls. Here we show that in combination, they cause greater landslide motion than either force alone. We also show the rigidity of the landslide’s bulk clearly decreasing during Ml ≥ 5 earthquakes. The recovery is affected by rainfall and small earthquakes (Ml

Suggested Citation

  • Noélie Bontemps & Pascal Lacroix & Eric Larose & Jorge Jara & Edu Taipe, 2020. "Rain and small earthquakes maintain a slow-moving landslide in a persistent critical state," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14445-3
    DOI: 10.1038/s41467-020-14445-3
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    Cited by:

    1. Chuang Song & Chen Yu & Zhenhong Li & Stefano Utili & Paolo Frattini & Giovanni Crosta & Jianbing Peng, 2022. "Triggering and recovery of earthquake accelerated landslides in Central Italy revealed by satellite radar observations," Nature Communications, Nature, vol. 13(1), pages 1-12, December.

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