2026-04-22

Packet 12 — Silo Atmospherics

Field-reportable observations on Silo ambient conditions.

Silo Atmospherics

The Silo's ambient environment is not stable. The instability does not exhibit a discernible pattern. The Office records the instability and proceeds.

Observed phenomena

  • Hum. Persistent low-frequency tone, present at every recorded depth. Volume varies; pitch does not.
  • Pressure. Slight positive pressure at entry points; reverses at exhaustive depth. The Office does not endorse explanations.
  • Thermal. Stable through exhaustive depth except in the Thermal Vault subcomplex, where stability is the failure condition.

Operators are advised to note ambient changes during Descents and report on FILE.