Recipe for Predicting Strong Ground Motions from Future Large Intraslab Earthquakes

Abstract eng:
We examine source characteristics of intraslab earthquakes based on eleven source models estimated by the empirical Green’s function (EGF) method. The asperity source model is used to characterize fault parameters (outer and inner fault parameters). We find self-similar scaling of total seismic moment to the asperity area and short-period level of the S-wave acceleration source spectrum. Based on these findings and theoretical relationships between the outer and inner fault parameters, we propose a recipe for characterizing the source model for future intraslab earthquakes. We make strong-motion prediction for the 1993 Kushiro-oki earthquake (Mw7.6) in the southern Kurile-Hokkaido arc by using the EGF method and the source model derived from the proposed recipe. A fairly good agreement between the observed and predicted waveforms is obtained at rock sites. However, the agreement is considerably decreased at soft-soil sites due to nonlinear soil response.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket