Scott Adams wasn't calling out the earthquake. In 1991, Haiti experienced a coup that ousted Jean-Bertrand Aristide and saw the installment of Raoul Cedras. If you want to credit Scott Adams with predicting something, credit him with predicting Operation Uphold Democracy, which saw a predominately American force landing in Haiti to oust Cedras and put Aristide back into power (this strip was done in July 1994, Operation Uphold Democracy began in September 1994).
@DilGirl: Uh, yeah, but one and a half decade later. If your meterstick for spooky coincidences is so flexible, you'll be able to find one almost wherever you'll look.