Shallow shear wave structure beneath China revealed by rayleigh wave ellipticity and receiver function


Shallow shear wave velocity structure plays essential role in earthquake hazard assessment, seismic imaging and geodynamic simulation. However, for China, it remains poorly constrained due to sparse data coverage for traditional body wave and surface wave tomography methods. To resolve it, Rayleigh wave ellipticity or ZH ratio, mainly sensitive to local shallow shear wave velocity (Vsv) model, and P wave receiver function (RF), reflecting discontinuities, are used to jointly constrain the shallow Vsv structure extending to 8 km from surface with a Markov Chain Monte Carlo (MCMC) method in this study.

Hefei, China