Interesting...
had windows raised Sunday night and about 4 a.m. heard a sound that have never heard before. Sounded close. Both Better Half and I asked each other, ‘did you hear that?’ Sounded something like a long elastic tie cord that had stretched out and had been shot through the air slightly above ground. Strangest thing have ever heard. A whistling sound and sounded like elastic expanding and retracting for about two or three seconds. Felt no movement and earthquakes in this region have been known to be proceeded by loud noises of the BOOM variety.