I have lived in L.A. for 41 years - my entire life - and have lived through many earthquakes. I hate them all. I don't care how small they are, if I can feel them, I hate them. And the bigger ones traumatize me.
That said, to our OP, you will be
fine. Even though California is "earthquake country," and we have small quakes every day, the chances of anything large enough happening for you to feel while you are here are so small that it really shouldn't even be a thought. The quake from last Tuesday (5.4) was a moderate to 'small' quake in seismological terms. Now, if you are watching the news and hear of an 7.5 - 8.0 happening here before your arrival, THEN you might feel something and have good reason to be nervous. But I think you will come out unscathed and not have to be initiated into the Earthquake Club! It won't even be a blip on the radar by the time you get here! And, believe me, as scared of quakes as
I am, if
I am telling you to not worry, you know you can believe it!!
Oh, regarding what one of our previous posters said, according to the news reports I watched, this Chino Hills quake did not relieve any pressure at all on the fault. It wasn't big enough. In fact, it may have increased pressure on other faults

A slip-thrust fault works a little differently from the 'normal' faults. They said it would take about 1000 of those same 5.4 quakes to relieve any pressure at all. The good news is that we don't seem to have suffered anything worse since that one on Tuesday, so the ground has probably calmed down for a while, thankfully!
