H. Zhong's scientific contributions

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Publication (1)

Apparent phase velocities and fundamental-mode phase velocities of Rayleigh waves
Article
  • Oct 2003
Rayleigh wave dispersion data usually appear in the form of multimodal spectra for a layered model structure. The number of dispersion modal curves depends on the number of layers in the model. The measured dispersion velocities from the frequency–wavenumber (F–K) space, however, may not represent the true phase velocities of the fundamental-mode d...
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... If the elastic properties of the subsurface vary with depth, the various frequency components are influenced by different effective elastic properties, and c R becomes a function of depth and frequency. The equations describing surface wave propagation can then have several solutions (i.e., possible combinations of frequencies and phase velocities), called modes, where the fundamental mode is the solution with the lowest phase velocity for a given frequency [37]. Since the Rayleigh wave is not inherently dispersive, any observed dispersion must be due to varying elastic properties of the near-surface sediments. ...
Reference: Potential Use of Time-Lapse Surface Seismics for Monitoring Thawing of the Terrestrial Arctic
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