Kenneth Arnold Sighting

While flying his CallAir A-2 from Chehalis to Yakima, Washington, businessman and experienced pilot Kenneth Arnold reported seeing nine crescent-shaped objects flying in formation near Mount Rainier at approximately 3:00 PM. Arnold estimated their speed at over 1,200 miles per hour, far exceeding any known aircraft of the era. He described their motion as “like a saucer skipping across water,” leading to the press coining the term “flying saucer.”

Arnold immediately reported his sighting to the FBI and civilian aviation authorities. His account gained national attention when reported by Associated Press journalist Bill Bequette, who interviewed Arnold at Pendleton Airport. Arnold’s credibility as an experienced pilot with over 9,000 flight hours and his role as a deputy federal marshal lent weight to his testimony.

The U.S. Air Force investigated Arnold’s report as part of Project Sign, the precursor to Project Blue Book. Military analysts initially suggested Arnold had observed a formation of experimental aircraft, meteorites, or reflected sunlight from conventional aircraft. Arnold rejected these explanations, maintaining he had observed structured craft of unknown origin and design.

Arnold’s sighting triggered a nationwide wave of UFO reports throughout summer 1947, including the Roswell incident and hundreds of copycat sightings. The term “flying saucer” entered popular vocabulary, although Arnold had described crescent shapes rather than discs. Skeptical investigators have proposed Arnold witnessed a mirage effect, military aircraft in formation, or pelicans flying in V-formation.

The incident established the template for modern UFO encounters: credible witnesses, extraordinary flight performance exceeding known technology, and official investigation yielding no conclusive explanation. Arnold’s report marked the beginning of the contemporary UFO phenomenon and remains a foundational case in ufology despite offering no physical evidence beyond eyewitness testimony.