RECIPE FOR PREDICTING STRONG GROUND MOTIONS FROM FUTURE LARGE INTRASLAB EARTHQUAKES
We examine source characteristics of intraslab earthquakes based on eleven source models estimated by the empirical Greens 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.
Intraslab earthquakes Strong-motion prediction Asperity source model Nonlinear soil response The 1993 Kushiro-oki earthquake
T. Sasatani S. Noguchi T. Maeda N. Morikawa
Professor,Graduate School of Engineering,Hokkaido University,Sapporo,Japan Graduate Student,Faculty of Science,Hokkaido University,Sapporo,Japan Researcher,Faculty of Science,Hokkaido University,Sapporo,Japan Researcher,National Research Institute for Earth Science and Disaster Prevention,Tsukuba,Japan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）