Night 1
September 19th, approx. 9:15pm
Sounded like a truck was pulling up in the neighborhood. Diesel engine sound for sure. No brakes, but a calmly running engine. Checked, no trucks anywhere near. Faint deisel engine sound outside. Recorded, but audio not clear even though it was a beautifully clear night with very little sound other than the 'engine' sound. Got in car and headed toward west end of town (where the sounds were reported from others), but had no luck capturing any audio. Very faint audio was detected in the west end. Sound was more intensely noticeable from home in back yard.
Sound was noticed to have ended sometime around 11:30pm.
Night 2
September 21, approx. 12:15am
Sounds of bass pumping, almost as if someone was sitting in their car with bass boosted to maximum. Upon inspection, there is no possible way that sound is coming from any car in the neighborhood, or house for that matter. It's too faint to be bass from music. Varying intensity, and very hard to capture the audio. Had better luck tonight than last night. No one would be adjusting the volume intensity of their bass as much as this changed. Sound appears to be coming from underground. Can feel vibration through floor of house and also out on the deck in the back yard. When in house, sounds like party, when outside, sounds very, very distant. Steady sound, varying intensity. Sounds now almost like a groaning or growling type of bassy sound. a small airplane sound has now been added into the mix. it's 1am. the plane doesn't sound like it's passing over/by. it sounds like it's hovering. Not changing pitch/tone at all. i will not chase down the sound tonight. Plane sound has been there since approximately 12:50am and has not stopped. 1:02am there was a 'whirring sound' and that lasted only a few seconds so I could not capture it. Like a whirring whistling whir sound. A sound that would commonly be associated with UFOs. 1:09am still hearing that 'airplane'. No more bass at this time. Seemed to have stopped with the whistling whir. Plane noise stopped circa 1:30am.
2am, started very faint and getting louder. I can feel it in my head.again, varying in intensity. Could hear it up until traffic started up around 7am.