Archive record
Record
The tone descended smoothly across its duration. No repetition has been observed since. Its proximity to the subsequent incident is noted but not established as causal.
Connected records
Connected recordSector Grey-9Connected recordThe Grey-9 WithdrawalConnected recordHalden Listening StationConnected recordResonance Mapping ProgramConnected recordHalden Deep ArrayConnected recordGreywater TerminalConnected recordAnalyst B. SørensenConnected recordDescending Tone — GreywaterConnected recordThe Sable PulseConnected recordDeep Array ReturnConnected recordThe Greywater Tone EventConnected recordStudy: Descending Tones as PrecursorsConnected recordPrecursor Signal Program