Sounds like it was a bit overhyped. I don't see much of an atmospheric dust cloud.... maybe some muddying of the water affecting fishing, plankton generation.
Maybe it was G-d fishing? "Teach a man to use half a stick over the side of the boat and he will feed himself forever."
And apparently there wasn't much of a tsunami.
I hate to sound like a naysayer --I've been wrong before --but I'll await further data before doing any pearl-clutching and hand-wringing and heading for the fainting couch.
Say, was that near McHale's Island? I know it wasn't near the Isle d'Gilligan. And Captain Nemo's lair, Lincoln Island, was purely fictional.
Terry, 230RN