基于频率-贝塞尔变换法的关东盆地S波速度成像

We applied a new method, the Frequency-Bessel transformation method (F-J method), to the ambient noise data of MeSO-net which is run by National Institute for Earth Science and Disaster Resilience (NIED). The F-J method can extract fundamental-mode dispersion curves and higher-mode dispersion curves from ambient noise effectively. We inverted for the S-wave velocity structure using fundamental-mode and higher-mode dispersion curves and compared our models with JIVSM. Our example shows that using higher-mode dispersion curves on the basis of fundamental-mode dispersion curves can reduce nonuniqueness in inversion and allow us to obtain more precise S-wave velocity structure.