I experienced a couple when I lived in California. They were small, but terrifying. We moved back to Chicago just a short time before the SF-Oakland bridge collapse. It was very close to where we lived.

@Druvius Of the dozens of things one could worry about (market crash, tornadoes, civil war, flooding, terrorist attack, plague, cancer, etc.), earthquake is way down the list. But then I choose not to worry about any of them. The probability of them happening is small, and my being able to predict or stop them non existent. So why worry. If they should happen, like everyone else, I will deal with them. Until that time, enjoy what we have.