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- W1983448960 abstract "Abstract The resolution of fine shear-velocity structure in the upper mantle is difficult because of the low signal-to-noise conditions in most recordings of short-period S waves, and the poor resolving power of long-period S data. The resolution obtainable from the latter could be improved if a greater proportion of the SH body-wave train at distances less than about 40°, presumably comprised of arrivals from a variety of multiple paths through the upper mantle, could be separated into its component signals. Attempts at deconvolving these wave trains by standard techniques, however, usually result in “noisy” spike sequences which are extremely difficult to interpret. The authors have devised an empirical method of decomposing an SH body-wave train into its component arrivals, based on sequential removal of the response wavelets from the train. Although the method is approximate in that it assumes the absence of phase distortion, it provides clear spike sequences which can be used to derive a starting model for the application of refinement techniques. Application of the method to SH wave trains recorded at NORSAR from Mediterranean earthquakes has enabled the construction of an SH-velocity model for the upper mantle beneath eastern Europe in which the discontinuity profile is strikingly similar to those of recent detailed P-velocity models for the upper mantle beneath central Australia." @default.
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- W1983448960 date "1982-10-01" @default.
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- W1983448960 title "Upper mantle modelling using long-period SH body-wave trains" @default.
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- W1983448960 doi "https://doi.org/10.1016/0031-9201(82)90126-1" @default.
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