Let's not be so dramatic about a shaker you do know that most of the midwest sits on a Caldera(don't hate me if I can't spell), don't you? (big volcano)... you're going to have rumbles from time to time...
though if that ever lets go, most of the US is toast... (and on that note I bid everyone sweet dreams )
There's no need to gloat....summer that lasts for sixteen hours and more a day, winter in swimsuits, quick twice-yearly flight between the two; some people have all the luck.