Earthquake Country

Yes, we had another earthquake in southern CA this evening. A 5.0 centered around San Bernardino. I was sitting here at the desk reading an article on the internet and suddenly there was a pretty large jolt. Nothing fell or broke ... no damage--it just startled me. This is the 3rd 5.0 or greater since last July. Prior to that it had been a long time since we felt an earthquake here in Palmdale. It makes me wonder if we're in for a bigger one.