What Really Caused the ROKS Cheonan Warship Sinking?

Figure 6

: The source of the vibration of signals; RS: the recording system at BAR station. Table 4 of [3] lists that the sound velocity in sea water is 1.5 km/s; the velocities of p-wave in crust and mantle are 6.3 km/s and 7.95 km/s, respectively, while those of -wave are 3.50 km/s and 4.41 km/s. The densities of crust and mantle are 2.58 kg/m³ and 3.30 kg/m³, respectively.