we have little earthquakes all the time. I'd venture to say at least weekly. Generally the only way I can tell we are having one is if I suddenly feel dizzy and sick at my stomach. The ones that shake the whole building don't make me feel nearly as bad as the little "earthshakes" I don't think there was any damage from this one. My hubby said he was lying in bed and just noticed the curtains rocking back and forth a bit.