What Really Caused the ROKS Cheonan Warship Sinking?

Table 3

The amplitude data of the peaks in the normalized frequency spectra for , EW, and NS seismic signals reported in Figure 3(b) of [9].

(Hz)		EW	NS	Av.^*
8.5	1.0	1.0	1.0	1.0
17.0	0.30	0.38	0.22	0.30
25.5	0.13	0.17	0.10	0.13
34.0	0.03	0.03	0.02	0.03

Av. is for the average of peak amplitudes in , EW, and NS.