Actually lots of folks notice small tremors. They're called wild and domesticated animals. If I was to import a fine Missouri mule or Foxtrotter the first week I'd just turn them out in a pasture. Why? equines have thousands of nerve endings in their feet and feel tremors we can't. A good horseman who brings stock to or out of California knows enough to give them time to settle down. In any case natural disasters of any magnitude are an opportunity for people to increase their awareness. We've had a notable increase in seaspouts off California lately. Friend of mine who lives on a boat is building a storm cellar in the bilge <img src="/images/graemlins/grin.gif" alt="" />