The biggest nuke blast ever (Tsar Bomba), bigger than any likely these days, was less than 5.5 magnitude.
My point was the blast, radiation and damage is much worse going off in a ship a few miles out and very easy for anyone buying a nuke to do.
Heck, these days they can even autopilot the ship into our shores.
That is a very real and possibly harder thing to get over.
But after reading this information again it seriously makes me wonder if I should look into a small Vegas family vacation home in case of a major disaster. Tried 4 years ago and made 4 offers when they were going from $30,000 to $58,000 for what would be a $350,000 Los Angeles home.
Tzar bomba was poorly acoustically coupled to the earth. Most of the energy went into the atmosphere.