Recent work with a prototype application for variable-period Rayleigh-wave magnitudes (Russell, 2006) has reported use of the Ms(VMAX) technique for periods between 8 and 25 seconds (Bonner et al., 2006a, 2006b, 2007). More recently, the technique has been extended to 40 seconds (Bonner, 2007). In all previous studies, the data were limited to continental paths and thoroughly reviewed. This study has attempted to evaluate an operational scenario whereby all surface-wave ...
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