Impact of a large-scale earthquake on the characteristics of rainfall-induced slope failure sites : Analysis of the Aso Caldera Wall before and after the 2016 Kumamoto Earthquake using Hayashi's Quantification Method-II

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This research aims to understand how large-scale earthquakes affect the characteristics of slope failure sites during rainfall.
Analyzed slope failure characteristics before and after the 2016 Kumamoto Earthquake.
Used Hayashi's Quantification Method-II to quantify characteristics like slope angle, curvature, and topographic wetness index (TWI).
Examined data from two rainfall events after the earthquake in the Aso Caldera area.
Post-earthquake rainfall induced slope failures predominantly occurred in areas aligned with the seismic fault.
Locations with amplified shaking during the earthquake showed increased vulnerability to slope failure.
The effects of the earthquake on slope failure characteristics remained significant for at least two months.

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Analysis assesses rainfall-induced slope failures in Aso Caldera Wall, indicating heightened risks post-earthquake.

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Saito et al. (2026) studied this question.

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