REF: UAP/1940s/013Unexplained
1947-06-24
Kenneth Arnold sighting
Mt. Rainier, WA · USA·Pilot sighting (origin of 'flying saucer')·1940s
Unexplained
§ ASummary
Private pilot Kenneth Arnold saw nine crescent objects flying in formation at estimated 1,200+ mph; press coined 'flying saucer'.
§ BWitnesses
Kenneth Arnold
§ CEvidence & Documentation
Arnold's written AAF report; contemporaneous press; 'The Coming of the Saucers' (1952)
§ DOfficial Investigation
Army Air Forces / Project Sign file
§ EStatus Assessment
Officially unexplained (Blue Book: mirage suggested; contested)
§ FVerifiable Sources
Project Blue Book file; Arnold & Palmer (1952); Bloecher, 'Report on the UFO Wave of 1947'
§ GCross-referenced cases6
1947-06-21🇺🇸 USA
Maury Island incident
Crash-debris claim (hoax)
1947-07-08🇺🇸 USA
Roswell incident
Crash-debris recovery
1947-07-04🇺🇸 USA
United Air Lines Flight 105
Airline crew sighting
1947-07-07🇺🇸 USA
Rhodes photographs
Photographic
1947-07-08🇺🇸 USA
Muroc AFB (Edwards) sightings
Military base multi-sighting
1948-01-07🇺🇸 USA
Mantell crash
Military fatality