Research
Open Questions
A short list of the things the Laboratories have measured carefully and cannot yet explain.
Most of what the Laboratories record is ordinary. These are a few of the things that are not. Each is stated as a question, because the Laboratories are careful not to answer more than the record allows.
The unresolved
- What sustains the narrow band near 18.6 kHz that has recurred, intermittently, for more than fifty years, matching no known transmitter, satellite, or natural emitter?
- What accounts for the small number of detections that arrive at separated stations in the same instant, after every test for chance and cross-talk?
- Why does one ground-resonance signal appear to correlate with fixed annual dates rather than with any astronomical cycle?
- What produces the narrow band that, on an irregular schedule, drops measurably below the surrounding background -- an apparent absorption rather than emission?
These are genuine open questions. The Laboratories pose them precisely, publish the supporting data, and keep each under active investigation. Progress on questions like these is measured in decades, not seasons.
Where the record is public
Where to find the data
The unresolved entries are in the Persistent Signal Catalog, and the most-studied of them have full findings with references. The Laboratories publish what the record supports and keep the open entries under study.