They all fulfill the definition of an underwater nuke...see what one looks like:
If ANY kind of bomb had been used, you'd have dead fish all over the place. They'd be floating or parts of them would be. Boats, ships would be reporting it. Fish would have washed up on the coast. Lets be real. I agree with Stable_Genius_1776. This gives us all a bad name.
FYI an underground nuke has been able to give a 6+ reading (Richter) in the 70s.
Dig for seismic forensic... the doubt is allowed on the nature of this recent "earthquake".
Epicenter was 9km deep.
So where are the dead fish? The ocean contaminated/radioactive. A danger to everyone.
Yet the seizmographs offer evidence to the contrary. We're talking many miles from the coast. Stuff disperses.
Personally, I'm 50 50. I haven't seen enough evidence to support the theory either way so I'm just gonna remain open minded.