Hi all
Having worked extensively in Christchurch post the big one I can tell you from first hand experience that earth shaking is earth shaking for people that went through the devastating time. Even to the point where I saw/see rational grown ups get Herron in their eyes when we have little tremors. In fact being in a site shed and having s large truck rumble by even set some people on edge. That's why I think that the trouble with earthquakes is not just the big one but living with small ones after a major one.
Anyway, someone above said it...don't worry about what you can't control.