Echoes_012–1C
Nickname: “Knock Twice”
Danger Ranking: 1C
First Reported: 1990-01-11, Grays River, WA

Summary:
Echoes_012–1C refers to a low-auditory resonance phenomenon that manifests as rhythmic knocking sounds, typically heard behind interior doors, walls, or inside empty rooms. The event occurs only in buildings that have been unoccupied for more than 72 hours and appear to correlate with local atmospheric pressure drops and elevated EMF activity.

The knocking patterns always begin with two distinct knocks, followed by silence, then either a reply or nothing at all. When individuals respond—either verbally or by knocking back—the anomaly escalates. The knocks return louder, closer, and eventually shift in location within the structure. In 6 documented instances, doors were found ajar the following morning despite secure locking mechanisms, and in one case, footprints were discovered inside an otherwise sealed cabin.

Attempts to trap or monitor the phenomenon using audio or visual surveillance fail to capture the source directly, although faint human shapes have been captured on FLIR during active incidents. It is currently unknown if the source is singular or if the anomaly is localized across a broader area.

Known Properties:

• Activates only in unoccupied structures after 72 hours.
  
• Begins with two knocks; will escalate if acknowledged.
  
• Creates a perceived sense of presence or being followed.
  
• Leaves minor physical evidence (open doors, displaced objects).
  
• Cannot be recorded using standard AV equipment.
  
• Emotional contagion effect: affected individuals report unease, reluctance to sleep, or an urge to flee the building.
  

Containment Procedure:
Currently classified as low-priority. Known affected structures in Wahkiakum County are monitored remotely and left uninhabited. No direct attempt is made to neutralize the anomaly due to its passive nature. Exploratory engagement is permitted under supervision with a 10-minute response protocol in place.

Digital audio logs are to be reviewed weekly. Field notes must include timestamps, atmospheric readings, and psychological feedback from assigned observers.

Encounters:

• 1990-01-11: First reported by maintenance crew arriving to reopen the Grays River ranger cabin.
  
• 1990-03-29: Two researchers knock back and report hearing a whispered name matching neither of them.
  
• 1991-07-12: Cabin rechecked—no evidence of human entry but recorded atmospheric drop by 8%.
  
• 1991-09-03: Knock pattern occurred in Site-04’s unused stairwell for 3 consecutive nights.
  

Recommendation:
Do not engage with the phenomenon directly. Avoid leaving unused structures sealed for long periods. Install uninterruptible recording systems for further passive documentation. Potentially useful in study of minor Echo-class intrusions.

List of Case Workers:

• Paranormal Surveyor C. Daley
  
• Junior Researcher M. Torres
  
• Ambient Field Technician A. West
  
• Site-04 Coordinator Dr. E. Pollack
  
• EMF Analyst H. Nguyen
  
• Night Observation Officer R. Menley