An open dataset for landslides triggered by the 2016 Mw 7.8 Kaikōura earthquake, New Zealand

Hakan Tanyaş*, Tolga Görüm, Islam Fadel, Cengiz Yıldırım, Luigi Lombardo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

On November 14, 2016, the northeastern South Island of New Zealand was hit by the magnitude Mw 7.8 Kaikōura earthquake, which is characterized by the most complex rupturing mechanism ever recorded. The widespread landslides triggered by the earthquake make this event a great case study to revisit our current knowledge of earthquake-triggered landslides in terms of factors controlling the spatial distribution of landslides and the rapid assessment of geographic areas affected by widespread landsliding. Although the spatial and size distributions of landslides have already been investigated in the literature, a polygon-based co-seismic landslide inventory with landslide size information is still not available as of June 2021. To address this issue and leverage this large landslide event, we mapped 14,233 landslides over a total area of approximately 14,000 km2. We also identified 101 landslide dams and shared them all via an open-access repository. We examined the spatial distribution of co-seismic landslides in relation to lithologic units and seismic and morphometric characteristics. We analyzed the size statistics of these landslides in a comparative manner, by using the five largest co-seismic landslide inventories ever mapped (i.e., Chi-Chi, Denali, Wenchuan, Haiti, and Gorkha). We compared our inventory with respect to these five ones to answer the question of whether the landslides triggered by the 2016 Kaikōura earthquake are less numerous and/or share size characteristics similar to those of other strong co-seismic landslide events. Our findings show that the spatial distribution of the Kaikōura landslide event is not significantly different from those belonging to other extreme landslide events, but the average landslide size generated by the Kaikōura earthquake is relatively larger compared to some other large earthquakes (i.e., Wenchuan and Gorkha).

Original languageEnglish
Pages (from-to)1405-1420
Number of pages16
JournalLandslides
Volume19
Issue number6
DOIs
Publication statusPublished - Jun 2022

Bibliographical note

Publisher Copyright:
© 2022, The Author(s).

Funding

The TanDEM-X data were provided by the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt) DLR, grant DEM_GEOL1995. The research presented in this article is partially supported by King Abdullah University of Science and Technology (KAUST) in Thuwal, Saudi Arabia, Grant URF/1/4338-01-01. The TanDEM-X data were provided by the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt) DLR, grant DEM_GEOL1995. The research presented in this article is partially supported by King Abdullah University of Science and Technology (KAUST) in Thuwal, Saudi Arabia, Grant URF/1/4338-01-01.

FundersFunder number
Deutsches Zentrum für Luft- und RaumfahrtDEM_GEOL1995
King Abdullah University of Science and TechnologyURF/1/4338-01-01

    Keywords

    • Co-seismic landslide
    • Kaikōura earthquake
    • Landslide dam
    • Landslide inventory

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