SUMMARY: Loud boom, so loud shook house. Went outside to see what happened. Saw hole in sky cover perfect circle. Moon in center of circle, full moon only 1/20 the size of hole. Lots of neighbors witnessed too. No aircraft or noises after that.

Sitting at home in the evening, when a loud boom shook the house.  Maybe a sonic boom.  Not sure.  
Ran outside with the curiosity of anyone my age (12) to see what had just happened.  Upon arriving outside, I saw a perfect"cookie cutter" round hole in the cloud cover.  The full moon was in the center of it.  The hole was HUGE!  The full moon was dwarfed by the circle in the clouds.  It is almost like something was there in the clouds and vacated immediately.  
Didn't see any aircraft of any kind.  No lights or engine sounds.  
I then noticed I was holding my pellet gun for protection and was also being watched by the  neighbors.  I felt out of place and went back inside.  
I would very much appreciate any kind of response to this.  I feel like it was very important.  But I have just found some one to tell that can't really tell me that I am a nut, if you understand.  Did any one elsereport anything similar anywhere near thattime?   Could be one year off either side.  Could it maybe be explained as a natural phenomenon?   Either way, I would just like to rid myself of the curiosity of the whole event.
Witness indicates that the date of the event is approximate.  PD