Publication Date:
2019
Description:
Abstract
It has been widely recognized that the cross‐correlation function (CCF) of ambient seismic noise data recorded at two stations approximates to the part of GreenâĂŹs function between two stations. Therefore, the CCF should include higher‐modes, aside from the fundamental mode. However, the problem of measuring or extracting overtones from ambient seismic noise data remains. In this paper, we propose the frequency‐Bessel Transform Method (F‐J method) for extracting the dispersion curves of higher‐modes from ambient seismic noise data. We then assess the validity, accuracy and applicability of the F‐J method by conducting extensive numerical simulations and processing the observed ambient seismic noise data of the USArray. As demonstrated in this study, the F‐J method is a convenient, practical, and accurate method for extracting the dispersion curves of multi‐modes from ambient seismic noise data and therefore has significant potentiality in the field of ambient seismic noise tomography.
Print ISSN:
2169-9313
Electronic ISSN:
2169-9356
Topics:
Geosciences
,
Physics
