Why is it unlikely that a tsunami will occur in Florida?

In the worst-case scenario, the largest possible quantity of mud and sand would plunge to the ocean floor from Great Bahama Bank, displacing enough water to slam South Florida with a 15-foot tsunami. While a wave of that height may not sound impressive, it represents something far more powerful than an ordinary 15-foot wave, since a tsunami is a wall of water that carries a vast amount of water behind it.

But there's no reason to flee to higher ground yet. The National Oceanic and Atmospheric Administration rates the tsunami risk for the east coast of Florida as low, compared to "very low" for the Gulf coast and "high to very high" for the Pacific coast. The authors of the study say there's no reason to revise that assessment.