In Pei et al. (2008) we introduced a new and more efficient algorithm, called the fast generalized R/T (FGRT) coefficient method, to calculate phase velocities of surface waves for a layered Earth model. We compared the phase velocities calculated by FGRT and by CPS (a seismology software package developed by Herrmann and Ammon [2002]). Both calculations yield identical results to 1% (Figs. 2 and 3, Pei et al., 2008) indicating that FGRT is accurate. However, there are errors in the original article, introduced by the copy editors and by the authors. We present here the...

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