This report uses the measured S-wave velocities for recovered core samples by Lee and others (2008) at the KC151 site, reconstituted sands by Zimmer (2003), and well-log data at the Walker Ridge and Alaminos Canyon sites acquired during JIP Leg II (Boswell and others, 2009). For 

velocities, BGT with dry moduli of the sediments proposed by Pride (2005) and Lee (2005) is used. In order to model the effect of effective pressure on velocity, a pressure-dependent consolidation parameter is incorporated into BGT. Accurate S-wave velocities for shallow sediments are important in performing a reliable elastic inversion for gas hydrate-bearing sediments and in evaluating velocity models for predicting S-wave velocities, but few S-wave velocities are measured at low effective pressure.