So, first things first: You may or may not feel it, as others have stated. This is for many reasons. I live within an hour of
Disneyland and had no idea there was an earthquake this morning until reading this. My point is: Depending upon where the epicenter is, you may not even know it happened.
Secondly, yes, if you are on a ride, you probably won't feel it. If you are in a moving vehicle, you may not feel it.
Thirdly, there was an earthquake about a week ago as well. The house jolted really hard. I jumped up, grabbed the dog (who was staring at me as if to say, "Uh, mom! What WAS that?!?!"), and it had stopped. That was it. DH was at the office and did not feel a thing.
Every earthquake is different. Sometimes you will feel them, sometimes you won't. However, if you DO feel it, you want to take cover in a strong door frame or under a strong table positioned so that you are on your knees with your head tucked under and your hands clasped over your neck. The idea is to protect your face and neck if the table you are under collapses. (That said, I have lived in So. Cal. almost my entire life and have NEVER had a situation in which "the safe position" was not sufficient.) So don't what if yourself on that part.

When the shaking stops, exit the building if you are in a public place until those in charge (Cast Members if at Disneyland) give you instruction. Remember, they know what to do, are trained, and are accustomed to "procedure."
Generally though, I would not worry about it. If it happens, you now have information and if it doesn't, you've worried for nothing. The thing about earthquakes, unlike storms is, you never know when they are going to happen, so you just can't worry about it. Just live life and have fun.
- Dreams