A few years ago I was giving an election worker training class (hence mostly middle age or older) and we were struck by an obvious tremor, a sharp sudden jolt that made our projector bounce around and fuzzed up our Powerpoint briefly. Not a peep from anyone as things settled down to normal.

We had a smart phone and accessed the USGS website and announced to the group at the end of the presentation that we had just been smacked by a Richter 4 something, epicenter about forty miles to the north.

Earthquakes are easier to handle if you have some experience with them. The Big One will be a little different, but we will be well practiced.