This study, regarding the effects of a 9.1 earthquake in Alaska, made the front page of the LA Times this morning:

http://www.weather.com/news/report-tsunami-would-swamp-californias-economy-20130905ijkk

The bad news - coastal areas like long Beach will be devastated. The good news - the area will have several hours warning.

I suppose this is one more factor in favor of South Dakota.
_________________________
Geezer in Chief