pure and applied geophysics

, Volume 132, Issue 1–2, pp 175–196 | Cite as

Transmission fluctuations across an array and heterogeneities in the crust and upper mantle

  • Ru-Shan Wu
  • Stanley M. Flatté


Adopting the spectral approach, we derive the formulation of angular coherence and transverse coherence of transmission fluctuations. Our derivation and results provide new insight on transmission fluctuation analysis. A review of research work on fluctuation analysis using observations at large seismic arrays such as LASA and NORSAR-follows. We point out that the model of a single-layer Gaussian medium cannot explain the angular coherence of NORSAR data and a more general model of a non-Gaussian, multi-scale, vertically inhomogeneous random media is needed. The model of a two-layer power-law medium proposed by Flatté and Wu is among the simplest of such models.

Key words

Wave propagation seismic waves heterogeneities lithosphere 


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Copyright information

© Birkhäuser Verlag 1990

Authors and Affiliations

  • Ru-Shan Wu
    • 1
  • Stanley M. Flatté
    • 2
  1. 1.Institute of GeophysicsChinese Academy of SciencesBeijingChina
  2. 2.Physics and Institute of TectonicsUniversity of CaliforniaSanta CruzUSA

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