Abstract
Based on coupled analysis and energy approach, this study investigates the relationship between the direction of rupture propagation and the predominant direction of pulse-like ground motions and landslides during Chi-Chi earthquake and Hualien earthquake. 46 pulse-like ground motions are selected to study. The results show that pulse ground motions containing high-energy pulse tend to be perpendicular to the direction of fault rupture propagation in thrust events. In contrast, it occurred along the direction of fault rupture propagation in strike-slip events. The predominant direction of landslides is stronger directionality of rupture propagation in thrust events. It can provide research foundation for the risk zoning of regional earthquake landslides.
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