Due of the discussion brought in this thread, it has come to the light that the previous formula for calculate Whitebeard's quake was incorrect.
For this reason, i decided to redo the calc by using the new formula that Migue79 has use for redone Lucy's Island Sinking Feat, which it seen to be more correct.
Mw = 1.5667 * Log( 1325.67 ) + 7.0781 = 11.9700196
Me = 11.9700196 + ( -4.9 + 4.7 ) / 1.5 = 11.8366863
3.589463e+22 Joules = 8.57902176 Teratons of TNT = Country level
8.57902176 Teratons of TNT = Country level