IPAS | Institutional Reference Edition
S
Shadow Transit Event — Movement of a shadow form across a surface without a corresponding physical object or light obstruction. (Associations: Shadow phenomenon; visual anomaly; liminal architecture.)
Somatic Pressure Wave — Rolling or wave‑like sensation moving across the body without environmental cause. (Associations: Somatic anomaly; atmospheric irregularity; pre‑event indicator.)
Static Charge Field — Localized sensation of tingling, hair‑raising, or electrical “buzz” in the absence of actual static sources. (Associations: Environmental anomaly; EM fluctuation; presence cue.)
Sustained Gaze Impression — Strong sense of being watched or observed despite no visible presence. (Associations: Presence phenomenon; cognitive overlay; corridor or cellblock alignment.)
Spatial Echo Event — Repetition of a sound or movement impression from a different part of the room than where it originated. (Associations: Auditory anomaly; environmental distortion; architectural influence.)
T
Temperature Cascade — Rapid sequence of temperature shifts (cold to warm or vice versa) occurring within seconds. (Associations: Temperature anomaly; environmental shift; high‑complexity event.)
Threshold Presence Event — Concentrated sense of presence or observation occurring specifically at doorways, arches, or transitional zones. (Associations: Threshold event; liminal architecture; multi‑witness alignment.)
Transient Apparitional Flash — Extremely brief visual form appearing for less than a second, often peripheral. (Associations: Visual anomaly; apparition subtype; low‑duration manifestation.)
Time‑Lag Perception — Sensation that external events are occurring slightly “out of sync” with real time. (Associations: Temporal distortion; cognitive anomaly; rare.)
Tonal Drift Phenomenon — Slow, sliding change in ambient pitch or hum without mechanical cause. (Associations: Auditory anomaly; EM correlation; environmental interaction.)
U
Unassigned Footfall Pattern — Footsteps heard in a space where no person or animal is present, often with consistent pacing. (Associations: Auditory anomaly; environmental repetition; corridor‑linked.)
Unidirectional Cold Sweep — Cold air moving in a single, clear direction despite no airflow source. (Associations: Temperature anomaly; airflow irregularity; proximity impression.)
Unresolved Form Impression — Vague sense of a figure or shape without visual confirmation, often felt rather than seen. (Associations: Presence phenomenon; cognitive overlay; somatic cue.)
Unstable Light Field — Flickering, dimming, or pulsing of ambient light not caused by electrical malfunction. (Associations: Visual anomaly; environmental interaction; EM fluctuation.)
Unlocalized Sound Event — Noise perceived without a clear point of origin, seeming to come from “everywhere” or “nowhere.” (Associations: Auditory anomaly; spatial distortion; high‑complexity potential.)
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