Articles | Volume 10, issue 1
https://doi.org/10.5194/se-10-275-2019
https://doi.org/10.5194/se-10-275-2019
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05 Feb 2019
Review article | Highlight paper |  | 05 Feb 2019

Power spectra of random heterogeneities in the solid earth

Haruo Sato

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Short summary
Recent seismological observations clarified that the velocity structure of the crust and upper mantle is randomly heterogeneous. I compile reported power spectral density functions of random velocity fluctuations based on various types of measurements. Their spectral envelope is approximated by the third power of wavenumber. It is interesting to study what kinds of geophysical processes created such a power-law spectral envelope at different scales and in different geological environments.