I was in my kitchen and heard a large boom and felt the floor shake as well as hearing the windows loudly rattle. My cat jumped about three feet in the air and ran for cover under the dining room table. It sounded like, what I imagine a sonic boom might sound and my first thought was an air force airplane station at McGee Tyson Airpot may have been flying extremely low over my house. While was not frightened, I was curious about what happened. After a few seconds, I started to wonder if it was an earthquake. In less than 2 minutes, reports of the quake were on our neighborhood email system. It was my first experience of an earthquake and I am thankful it was not stronger.