Persistent Signal Catalog ยท Class III
The worldwide hum
A persistent low hum reported by a small fraction of people in scattered locations, difficult to capture on instruments. Documented for decades; not explained.
A persistent low hum reported by a small fraction of people in scattered locations, difficult to capture on instruments. Documented for decades; not explained.
- Source
- Various (self-reported)
- As of
- Public catalog record
- Method
- Illustrative public visualization; raw station records are not reproduced.
Public packet
- catalog abstract
- classification rationale
- public source links
Review controls
- Coordinate source
- Public location statement
- Uncertainty
- Location is descriptive and not a source attribution
- Release state
- External literature case retained for comparison
Processing notes
- source publication review
- coordinate normalization for Night Watch where available
- classification against FAL behavioral taxonomy
- retention as a public comparison case
Ordinary-source checks
- source interpretation retained from the cited literature
- public summary avoids unsupported origin claims
- comparison use is behavioral rather than evidentiary
Release limits
- interpretation remains with the cited source record
- FAL classification is behavioral and does not replace the original literature
- coordinates are shown only when stable public values are available