Rayleigh wave ellipticity estimation from ambient seismic noise using single and multiple vector-sensor techniques

摘要: In this paper, we present three new methods to evaluate the ellipticity of polarized signals generated by seismic ambient vibrations. Classically, estimation Rayleigh wave is performed using a spectrum ratio approach [15]. Here, propose use two single-sensor techniques (based on ellipse fitting [8] and random decrement [2]) one multi-sensor technique quaternion-MUSIC [12]) substitute existing algorithm. an important geophysical parameter because its as function frequency leads velocity vs. depth estimation, i.e. identification underground structure. We illustrate algorithms simulation data compare them approach.