Yeah, the only reason I knew it happened was because I was on the 2nd floor of a building and my desk rattled a little.
Mom and Dad, Mrs WBill, etc etc had no idea.
As a side note, the (not-too-bright, prone to hysteria) girl who sat in the office next to mine started to panic. "What do I do? Where will I go? What if there are AFTERSHOCKS!?" Imagine someone standing there, hollering this, with the back of their hand thrown dramatically to their forehead, and you'd get it....
I tossed a cold bucket of water on the panic party. "First, if you really are worried about aftershocks, then I'd get away from that floor-to-ceiling plate glass window you're standing next to. Then, if you're really, really worried, you can go stand outside in the parking lot for awhile. Nothing will fall on you there." End of panic attack.