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Landslides triggered by multiple earthquakes: insights from the 2018 Lombok (Indonesia) events

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  • M. F. Ferrario

    (Università degli Studi dell’Insubria)

Abstract

Earthquake-triggered landslides significantly contribute to worsening the impact of seismic events; thus, comprehensive landslide inventories are essential for improving seismic hazard assessment. During complex seismic sequences, landslides are triggered by more than one event and the final inventory reflects the spatial and temporal evolution of the sequence. Here, I analyze the landslides triggered by the 2018 Lombok (Indonesia) seismic sequence. I use high-resolution satellite imagery to map 4823 landslides triggered after the 05/08/2018 event (Mw 6.9) and 9319 landslides after the 19/08/2018 event (Mw 6.9). I analyze the distribution and evolution over time of landslide density and landslide area percentage. Despite the significant increase in number and cumulative area of the landslides, the 05/08 and 19/08 events share the maximum dimension of individual landslides; this suggests that the maximum intensity is equal for the two events, i.e., X on the Environmental Scale Intensity scale. I compare the distribution of landslides with macroseismic information provided by eyewitnesses through online questionnaires. Finally, I investigate the role of earthquake environmental effects within seismic sequences, showing that effects on the natural environment provide complementary information with respect to traditional intensity and felt reports.

Suggested Citation

  • M. F. Ferrario, 2019. "Landslides triggered by multiple earthquakes: insights from the 2018 Lombok (Indonesia) events," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 98(2), pages 575-592, September.
    • Handle: RePEc:spr:nathaz:v:98:y:2019:i:2:d:10.1007_s11069-019-03718-w
    DOI: 10.1007/s11069-019-03718-w
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    References listed on IDEAS

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    1. M. Budimir & P. Atkinson & H. Lewis, 2014. "Earthquake-and-landslide events are associated with more fatalities than earthquakes alone," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 72(2), pages 895-914, June.
    2. Chong Xu & Xiwei Xu & Bengang Zhou & Guihua Yu, 2013. "Revisions of the M 8.0 Wenchuan earthquake seismic intensity map based on co-seismic landslide abundance," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 69(3), pages 1459-1476, December.
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    Cited by:

    1. Jingjing Jing & Zhijian Wu & Chengxin Chu & Wanpeng Ding & Wei Ma, 2023. "Prediction of landslide hazards induced by potential earthquake in Litang County, Sichuan, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 118(2), pages 1301-1314, September.
    2. Endra Gunawan & Ruth Amey & John Elliott & Sri Widiyantoro & Nanang T. Puspito & Nuraini Rahma Hanifa & Syamsuddin & Ekbal Hussain, 2023. "Coseismic deformation of the 19 August 2018 Mw 7.2 Lombok earthquakes, Indonesia, estimated through InSAR and GPS observations," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 119(1), pages 545-558, October.
    3. Changhu Xue & Kejie Chen & Hui Tang & Chaoqi Lin & Wenfeng Cui, 2022. "Using short-interval landslide inventories to build short-term and overall spatial prediction models for earthquake-triggered landslides based on machine learning for the 2018 Lombok earthquake sequen," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 114(3), pages 3575-3595, December.

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