“…For the first case the obtained P wave velocity is 2368 ms −1 and for the second case it is 2408 ms −1 . Therefore, at the full-transformed state of hydrate formed in a free-gas system (scan 1) the P wave velocity is slightly lower than at the full-transformed state of hydrate formed in a gasrich system (scan 8), which has been discussed earlier in the literature (Priest et al, 2005;Konno et al, 2015;Waite et al, 2009). With the presented results of the modeled P wave velocities the model approach is in a realistic range when compared with field (Carcione and Gei, 2004;Riedel et al, 2002;Yuan et al, 1996) and laboratory data Priest et al, 2005Priest et al, , 2009), but it is noteworthy that the modeled results give only slightly lower values than the experimental ones, even though at significantly lower hydrate saturation (< 20 %) compared to results from laboratory work.…”