Kenneth Arnold UFO Sighting, San Francisco, California (22 August 1947)
A letter from Mr. F. Johnson was received regarding a possible flying disc sighting. The Fourth Air Force noted a similarity between this report and the earlier Arnold report, suggesting potential influence from newspaper publicity. The Air Force dec
Background
On 22 August 1947, in San Francisco, California, U.S. government investigators recorded an unidentified-object incident later released to the public on May 8, 2026 as part of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE). The incident is one of the first wave of “flying saucer” reports that swept the United States after the Kenneth Arnold sighting of June 1947 and the Roswell incident of July 1947. The case was filed with the Federal Bureau of Investigation, whose Knoxville, Albuquerque, Los Angeles, and other field offices routed UFO reports to headquarters under the Bureau’s standing protocols for the protection of vital installations.
What the document records
A letter from Mr. F. Johnson was received regarding a possible flying disc sighting. The Fourth Air Force noted a similarity between this report and the earlier Arnold report, suggesting potential influence from newspaper publicity. The Air Force decided not to investigate the incident but requested any findings from an FBI interview.
The number of witnesses is not specified in the released document.
Type of case
The witnesses described the object as disc- or saucer-shaped.
Status
All records released under the PURSUE program are designated unresolved by the All-domain Anomaly Resolution Office (AARO) by default. The federal government has not concluded that the events were anomalous, has not concluded that they were conventional, and has not ruled out either possibility. Conventional candidates for sightings of this period include experimental aircraft, weather balloons (especially the Project Mogul series in the late 1940s), atmospheric optical phenomena such as sundogs and lenticular clouds, and astronomical objects including Venus, the Moon, and meteors near the horizon.