Earthquake in Oklahoma

About 20 minutes ago, I experienced my first earthquake. The house started shaking and then I heard rumbling. At first, I thought maybe a plane was flying over really low. When it stopped, I went to look out the bathroom window upstairs to check on our pool. The water on the top of the cover was still rippling. The news I'm getting is that it was a 4.5 mag a few miles south of Norman. Thankfully we were not affected and are safe.