Homomorphic filtering (Oppenheim et al., 1968), recently applied to seismology by Ulrych (1971), has been used to deconvolve three earthquake and one underground nuclear explosion seismograms recorded at leduc, Alberta. Comparison of actual recordings with seismograms synthesized using deconvolved wavelets together with a crustal response computed from a well-defined crustal model shows striking correlations. This improved wavelet extraction procedure is expected to be an aid in Q, source mechanism, and depth studies as well as crustal deconvolution investigations.

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