Abstract
Summary Surface waves are widely used to determine near-surface S-wave velocity structures. The individual surface-wave phase-velocity inversion and waveform inversion suffers from relatively low resolution and high ambiguity, respectively. We propose to adopt a sequential phase-velocity and waveform inversion of surface waves to delineate near-surface materials. The phase-velocity inversion result is smoothed and used as the initial model for waveform inversion. We applied our method to a field data collected in Olathe, USA. Shape of the bedrock is clearly delineated in the inversion result. The sequential-inversion result nicely agrees with the borehole data, indicating relatively high reliability of it. This study shows that the sequential phase-velocity and waveform inversion can provide an effective way for high-resolution imaging of near-surface materials.
Published Version
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