I was sitting at my desk around 8:45 AM and heard a loud sound. I thought it was an earthquake, but the floor didn't shake. I checked the earthquake maps and didn't see anything. I then searched the house to see if someone was in the house, but luckily didn't find anyone. Then I spoke with my dad later and he said he heard the same thing; we concluded we heard it at the same time (he's about 30 minutes from me), so I poked around and found an article about it. Not sure if it really was a sonic boom, but it really scared me and the dog. I think it is the military; of course they'll never tell us anything.