The Pentagon commissioned RAND, the Air Force’s Federally Funded Research Center, to map public reports of Unidentified Aerial Phenomena across the United States. The report was completed in May 2023, sent to the Department of Defense for review, and published on July 25. The RAND report, with access to great swathes of data, offers a good starting point for mapping recent sightings. When it comes to modern observations of Unidentified Aerial Phenomena, the study’s most concrete finding is that unknown aircraft are most commonly reported near Military Operations Areas (MOAs), or swathes of the sky designated for military practice and maneuvering. These areas are not necessarily near air bases.
https://www.rand.org/content/dam/rand/pubs/research_reports/RRA2400/RRA2475-1/RAND_RRA2475-1.pdf