Abstract
The objective of this study is to estimate the dynamic characteristics of subsurface ground in Minabe plains in Wakayama prefecture by micro-tremor observations. Minabe Plains has developed along the Minabe River, and is the second largest alluvial plain in Hidaka district. However, sufficient investigations about the dynamic property of subsurface ground have not been done. In this study, micro-tremor observations were carried out at 89 points in the plain, and the contour map of the predominant period of ground was presented. The contour map of the depth of engineering bedrock estimated with the data of borehole was also presented.
