Inversion strategy for seismic source and regional parameters

To obtain source and regional parameters, which are adopted to describe the earthquake source and crustal medium in a region to estimate ground motion, an inversion strategy is presented in this paper. Since these parameters are inversed from seismographic records by micro-genetic algorithm to establish strong ground motion attenuation relations, it is important to choose parameters not related with the sizes of earthquakes. One source parameter, stress drop Δσ, and four regional ones, Q₀, η, R₁ and R₂, are selected as the inversed parameters.