Numerical study on dynamic behavior of surface ground near the long-distance ground-flow area caused by the 2018 Sulawesi earthquake, Indonesia

Abstract

The 2018 Sulawesi earthquake caused massive ground flow in several areas in Palu city. In this study, the relationship between the input ground motion level and the behavior of surface soil in no flow area is evaluated by numerical approach. The ground was modeled with parameters as standard values on geological engineering or empirical relationship. As a result, there is no specific characteristic in the seismic behavior of the surface ground, and that the large-scale flow is caused by a combination of other causes in addition to the seismic behavior of the ground. In the future, plan to collect more data to elucidate the mechanism of large-scale flow.