RESOLUTION OF THE SPAC, CCA, NC-CCA AND V-METHOD FOR MICROTREMOR ARRAY SURVEY ON DEEP SEDIMENTARY BASIN - CASE OF THE ASAKA BASIN -

Abstract

 Resolution of the phase velocity estimation methods, SPAC-, CCA-, nc-CCA-, and V-method, is investigated using microtremor data obtained with circular arrays of the vertical velocimeters deployed on the Osaka basin. The resolution of CCA- and V-methods in terms of maximum wavelength is more than twise as that of tha SPAC-method whenarray radius is less than 50 m. On the other hand, for tha array radius larger than 100 m, four methods show similar resolution in terms of maximum wavelength.