INTRODUCING NEAR AND INTERMEDIATE FIELD TERMS INTO CORRECTED EMPIRICAL GREEN'S FUNCTION METHOD

Abstract

 Surface ruptures were observed after the main shock of the 2016 Kumamoto earthquakes. Large velocities were also observed at the strong motion stations near the surface ruptures. Near and intermediate field terms due to the shallow slips could be responsible for the large velocities. In this study, in order to include the near and intermediate field terms in the strong motion simulation, we verified the method by Nozu (2006) to consider these terms by comparing numerical and analytic solutions. They showed good agreement when the interval of the point sources in Nozu (2006)'s method was appropriate. Then the relationship of the size of the fault plane and the permanent displacement, and the contributions of each term were examined.