The Reported Shape, Size, Kinematics, Electromagnetic Effects, and Presence of Sound of Unidentified Aerial Phenomena from Select Reports, 1947-2016
Robert M. Powell · Larry Hancock · Laiba Hasan · Sarah Little · Robinson Truong · Tobi Kamoru
SCU · 2023
A 301-case, five-database study catalogues the reported shape, size, velocity, electromagnetic interference, and sound of UAP across seven decades of military and civilian reports, constituting the first multi-database physical-parameter dataset for the phenomenon.
Brief
Powell et al. (2023) aggregated 301 UAP reports from one military and four civilian databases spanning 1947 to 2016, coding each case for morphology, estimated scale, kinematic envelope, EM interference signatures, and acoustic character. The study is distinguished as the first systematic, multi-source compilation of UAP physical parameters rather than a single-database or anecdotal review. Dominant reported shapes include disc and sphere forms; a substantial fraction of cases include electromagnetic interference with vehicles or electronics; and silent operation is disproportionately frequent relative to human aircraft of comparable reported size. No probabilistic inference framework is applied, the paper is descriptive and distributional.
Metadata
- Category
- Phenomenon
- Venue
- SCU
- Type
- White paper
- Year
- 2023
- Authors
- Robert M. Powell, Larry Hancock, Laiba Hasan, Sarah Little, Robinson Truong, Tobi Kamoru
- Access
- Open access
- Data sources
- NUFORC, MUFON, NICAP, military UAP database (unspecified), civilian UAP databases
- Tags
- UAP-physics, UAP-morphology, UAP-kinematics, EM-effects, multi-database, case-study
Key points
- Sample consists of 301 UAP reports drawn from one military database and four civilian databases, spanning 1947 to 2016, roughly seven decades of case accumulation.p.1
- Morphology coding reveals disc and sphere geometries as the modal reported shapes, with triangular and cylindrical forms also represented in the distribution.
- Kinematic parameters include reported velocity and acceleration values that, in a subset of cases, far exceed the performance envelope of any known contemporary aircraft.
- Electromagnetic effects, including vehicle ignition failure, compass deviation, and electronics disruption, are documented across a meaningful fraction of the 301 cases, establishing EM interference as a recurrent physical-parameter signature.
- Silent or near-silent operation is reported in a large proportion of cases regardless of estimated object size, which is anomalous relative to all known propulsion technologies at comparable scales.
- The multi-database methodology is described by the authors as the first of its kind for UAP physical-parameter characterization, enabling cross-source consistency checks not possible with single-database studies.p.1
Most interesting
- The dataset spans 69 years of reports yet the authors treat it as a single distributional sample, an implicit claim that whatever is being observed has maintained consistent physical characteristics across more than six decades.
- Including a military database alongside four civilian sources allows the study to test whether shape and kinematic distributions differ by reporting population, a methodological control absent from most prior UAP literature.
- Electromagnetic interference with vehicle ignition systems is one of the best-documented recurring physical effects in UAP case literature; its presence across multiple independent databases in this study strengthens the cross-source signal.
- The paper was released as a Zenodo white paper under the Scientific Coalition for UAP Studies (SCU), a 501(c)(3) research organization, rather than through a peer-reviewed journal, making it accessible and citeable but without formal peer review.
- Coding acoustic signatures (sound vs. silence) as a formal parameter alongside kinematics and EM effects is methodologically unusual and positions the dataset for future comparison against acoustic sensor data if such cases are identified.