Strangers who were not talking to each other described whooping within hours of each other, mostly in night.
What was also happening that night
A magnitude 3.4 earthquake was recorded 7 km SSW of Mineral, Virginia at 2011-09-01 09:09 UTC. (USGS)
Venus was 21 degrees above the horizon at magnitude -3.8, bright enough to be mistaken for something else (computed)
Were you there?
Both answers are useful, and the second one more than people think. If you were outside on 2011-09-01 in that part of the world and saw nothing at all, say so. A record that only collects sightings can never be argued with.
At about 10:45 PM EDT I walked out to my work vehicle to grab a smoke and my phone. After I shut the door I heard something hit the building next door followed by "whooping". "WHOOOOWHOOP" A lower tone followed by a higher one. VERY SIMILAR to your recordings.…
The numbers behind this cluster
E-2011-09-01-40-76 · 3 accounts across 3 places · wording independence 0.909 by shared vocabulary, 1 by shared phrases · coherence 2.959 · sources nuforc:2, bfro:1
Wording independence near 1.0 means people described it in their own words rather than repeating each other. The two numbers are two measures of the same thing: overlap in the words chosen, and overlap in exact phrases, which is the stricter test for copying.
Know someone this happened to?
If somebody you know was in the area that night, or has told you a story that sounds like this one, this is the page to send them. They may be the next account on it.
Anomaly