Direct inversion of surface wave dispersion for three-dimensional crustal azimuthal anisotropy based on frequency-dependent ray tracing

Chuanming Liu1,2, Huajian Yao1,2, Hsin-Ying Yang3,4 and Hongjian Fang2,5, (1)USTC University of Science and Technology of China, Laboratory of Seismology and Physics of Earth's Interior, Hefei, China, (2)USTC University of Science and Technology of China, School of Earth and Space Sciences, Hefei, China, (3)School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China, (4)University of Science and Technology of China, Hefei, China, (5)USTC University of Science and Technology of China, Hefei, China