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- W2121916324 abstract "Precise observations of travel time changes of P and S waves from 11 explosions at the same shot point in the Charlevoix region, Quebec, have been determined by separate cross correlations of the P and S waveforms. The changes in P and S wave travel times are equal to within +- 4 ms and lead to the relation that da = 3db. From the theory of O'Connell and Budiansky (1977) the derivatives of the normalized P and S wave velocities with respect to the normalized S wave velocity define the changes in crack density parameter e and the partial saturation parameter z. Increases in travel time observed in the Charlevoix region suggest that the crack density parameter e increases, while the partial saturation parameter z decreases, in agreement with the dilatancy hypothesis (Nur, 1972)>" @default.
- W2121916324 created "2016-06-24" @default.
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- W2121916324 date "1981-02-10" @default.
- W2121916324 modified "2023-09-26" @default.
- W2121916324 title "PrecisePandSwave velocity variations, crack density, and saturation changes" @default.
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- W2121916324 doi "https://doi.org/10.1029/jb086ib02p01042" @default.
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