Construction of a zoning map considering vulnerability to co-seismic landslides

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The aim is to create a zoning map that categorizes slopes based on factors influencing co-seismic landslides.
Developed geological and terrain classifications based on seamless geological maps and DEM terrain data.
Integrated the information into a zoning map with seven categories at a resolution of approximately 250m.
Analyzed the relationship between seismic motion and landslide area during the 2016 Kumamoto earthquake.
Identified that the relationship between seismic motion and landslide area ratio varies across different geological types.
Discovered differing behaviors in landslide area ratio concerning slope gradient for unconsolidated layers, soft rock, and hard to medium-hard rock.
A comprehensive zoning map may improve estimates of landslide occurrence probability across different zones.

Study constructs a zoning map to estimate landslide risk in regions, suggesting effective hazard assessment.

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Iwahashi et al. (2026) studied this question.

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