@blueveinedthrobber,
I posted a scary article a month or two ago, in butrfly's earthquake thread - I'll see if I can find it. Not so much about rads, but about big changes on the ocean floor. Immense debris. (I get it that that is the way of it.) My uncle was a freighter captain, uncle and my father fished often in the Pacific and california rivers, all this long ago, a century ago, or close to it. Makes me sad.
On the rads long term effects, I'm no expert, but listening.