Disclosed

Maury Island incident

Date
21 Jun 1947
Place
Maury Island, Puget Sound, near Tacoma, Washington, United States
Record
Curated case
Assessment
Explained
Evidence strength
467 case pages by decade; this one falls in 1940s with 30 othersAll cases

What was reported

Harbor patrolman Harold Dahl and his associate Fred Crisman claimed that six doughnut-shaped craft hovered over Dahl's boat and one dropped slag-like debris that killed a dog and injured his son. Kenneth Arnold was brought in to investigate, and two Army Air Forces intelligence officers who took custody of fragments died when their B-25 crashed on the return flight, which fed later cover-up stories. The FBI file released through PURSUE records the investigators' finding that the story was false, Dahl's statement that he would call it a hoax if questioned, and a reporter calling it a complete fabrication. Edward Ruppelt later called it the dirtiest hoax in UFO history.

What officials concluded

Resolved

FBI and Army Air Forces: a hoax; the fragments were ordinary slag

Strongest ordinary reading

Hoax by Dahl and Crisman

Evidence profile

Sensors1 of 9
  • Yes: Visual
  • No: Infrared
  • No: Radar
  • No: Video
  • No: Photo
  • No: Film
  • No: Audio
  • No: Night vision
  • No: Other sensor
Witnesses2 counted
  • Yes: Civilian
  • No: Military aircrew
  • No: Military ground
  • No: Airline crew
  • No: Sensor operator
  • No: Law enforcement
  • No: Scientist
  • No: Astronaut
  • No: Intelligence official
  • No: Other
ShapeOther shape
  • No: Light only
  • No: Orb or sphere
  • No: Disc
  • No: Triangle
  • No: Cylinder
  • No: Cube
  • Yes: Other shape
Effects1 reported
  • No: Physiological
  • Yes: Physical trace
  • No: Electromagnetic
  • No: Sound
  • No: Silent

Pentagon files

1
  • Document65_HS1-834228961_62-HQ-83894_Section_003Release 1

    65_HS1-834228961_62-HQ-83894_Section_003

    The section's central content is the FBI's own investigation of the Maury Island incident (Tacoma, WA, June-August 1947): Harold Dahl and Fred Crisman's story of disc fragments falling on Dahl's boat, told to Kenneth Arnold and to two Army Air Forces intelligence officers who died in a B-25 crash hours after taking custody of the fragments. The file records that an Associated Press wireman found Dahl's own wife pushing him to admit 'the entire story was a plain fantasy' and that a Boise reporter independently called it 'a complete fabrication.' The section also carries the formal FBI-AAF correspondence on cooperation terms, including an Air Defense Command memo limiting the Bureau's role to discs found on the ground, and a Bureau memo dated near the end of the section recording that the FBI discontinued its flying-disc investigative activity effective immediately per Bureau Bulletin No. 42, referring all future reports to the Air Forces.

    Open the original on war.gov

Outside sources

On the map

47.38° N, 122.45° W, plotted at the centre of the region named in the record

Show on the map