THRESHOLD COMPLEX EXPLORATION LOG

Designation / Log ID: 68-M65

Apparent Date/Time: 15 October 2026 / 09:14:22 (instrument clock) — secondary stamp reads 03:58 (corridor clock, unpowered)

Entry Method: Noclip through ventilation grate, Level 0 east corridor.

Environmental Baseline

Lighting: overhead fluorescent tubes. Color temperature registers 4100 K at instrument height. Floor-level reading registers 3620 K. Flicker occurs at 0.4 Hz intervals.

Ambient temperature: 19.2 °C at the entry grate; 15.7 °C at the gallery midpoint. Humidity: 71 %.

Background sound: continuous 48 Hz hum. Water droplets strike the floor at the 19 m mark. The impact sound registers 1.6 seconds after visual contact.

Air movement: none detected. Barometric pressure 101.3 kPa.

Spatial Observations

Gallery extends 64 m by laser measure. Pace count records 49 m. Width remains 4.2 m along the entire length.

Walls: painted cinder block. Paint exhibits blistering in circular patches 11–14 cm across at 7 m, 22 m, and 41 m.

Floor: bare concrete. A central band 1.8 m wide remains damp. Drainage channels run parallel for 27 m then converge.

Ceiling height measures 3.3 m. Height drops to 2.6 m at the 33 m mark. No seam or transition appears.

A single yellow painted line runs along the left wall base. The line terminates at both ends. No continuation or endpoint mark exists.

Anomalies

Sound from water impact arrives after the visual event.

Temperature declines toward the gallery center. No vents or openings appear.

The far door opens onto the same gallery. The new entry point lies 9 m closer to the original grate.

A second laser measure of the same segment returns 71 m.

Entity Notes

No entities observed.

Exit / Continuity Status

Exit occurred through the original ventilation grate. Duration inside: 19 minutes.

Continuity status: intact.

Residual effects: instrument humidity sensor elevated by 14 % upon return. Mild pressure sensation in the ears persisted for 6 minutes. No further deviations recorded.