[SSS12-13] The influence of horizontally elongated fine scale heterogeneity on surface wave phase speeds and apparent radial anisotropy *徐 雲遨1、吉澤 和範2、古村 孝志3 (1.Graduate School of Science, Hokkaido University、2.Faculty of Science, Hokkaido University、3.Earthquake Research Institute, Univ. of Tokyo)