SEGJ Technical Conference

Estimaition of phase velocities and power fractions of Love waves in horizontal microtremors by FK and SPAC methods

Abstract At the ground in Iwate University, the applicability of frequency-wavenumber wavenumber analysis method and spatial auto-correlation method for estimating phase velocities in microtremors using a three-component array consisting of 10 sensors was studied. As a result, SPAC method and FK method in different type triangular arrays with same sensor number with different orientations was able to obtain the same phase velocities. It was possible to obtain dispersion curves in a wide frequency band using arrays consisting of 10 sensors. In the horizontal microtremor analysis it was possible to obtain the phase velocities of the Love wave using both FK method and SPAC method in a wide frequency band.