Spatial Variability of Periodic Characteristics among Strong Ground Motions Derived from Multiple Fault Rupture Scenarios

Abstract

This paper presents spatial variability of periodic characteristics in strong ground motion distributions from both strike slip and reverse faults. Three hundreds fault rupture scenarios are assumed for each fault type. Strong ground motions are simulated by stochastic Green's function method at 10,201 points around the fault, 200 km x 200 km, 2 km mesh. The simulated distributions in each period range suggest that the value of variation coefficient depends on positional relationship between the target fault and site. The results can be used for preliminary assessment of ground motion variation in target period range, and also focusing point of active fault investigation.