"Mega-tsunamis have happened with greater frequency than modern science would like to believe, and no coastline in the world is safe, says Canadian geologist-geographer Edward Bryant.... Bryant's suspicions of meteor and comet impacts a relatively short time ago rile many in the scientific community who believe the chances of Earth colliding with space debris are tiny. But Bryant says computer modelling suggests a meteor would not have to be a "dinosaur killer" to cause a mega-tsunami. A chunk 100 metres in diameter moving at 20 metres per second could theoretically produce a tsunami that is 27 metres high at source."
-- Michael Christie, Reuters, 26 February, 2002

While I contend that the burden of proof is on Christie and his ilk, I would not be shocked to find out that eventually they were closer to the truth regarding the frequency and local devastation effects of smaller impactors. And Tsunamis have a LONG reach.

-p