Publication Date:
2020-02-12
Description:
Synthetic 1-D models of 3-component data recorded during the BABEL experiment by two land stations F01 and F04 are presented. The stations are located in the Bothnian Gulf, at the southern end and to the east of the BABEL line 1, respectively. As the noise, both random and coherent, has similar characteristics on both the in-line (F01) and the quasi-fan (F04) seismic profiles, the same processing procedure (frequency bandpass, frequency-wavenumber and coherence filtering and vertical stacking) has been applied. The observed shear-wave phases help to put constraints on the reconstruction of the P and S-wave field. Synthetic modeling has been performed using the reflectivity method assuming that both the P and PS sea-bottom converted waves are propagating directly from the source and omitting the laterally inhomogeneous first layer, in which the lateral contact between the sea water and the granitoid rocks of the land occurs. The velocity-depth function has been reconstructed taking into account 2-D effects to explain misfits between the theoretical and the observed traveltime curves. A Poisson´s ratio crustal model is also proposed.
Keywords:
550 - Earth sciences
Type:
info:eu-repo/semantics/bookPart
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