On the afternoon of June 24, 1947, businessman and pilot Kenneth Arnold was flying his CallAir A-2 from Chehalis, Washington, to Yakima, searching for the wreckage of a military transport plane near Mount Rainier. At approximately 3:00 PM Pacific Daylight Time, while at an altitude of 9,200 feet, Arnold reported observing a chain of nine bright, disc-like objects flying at an extraordinary speed. He claimed these objects were moving faster than any aircraft known at the time, covering the distance between Mount Rainier and Mount Adams – roughly 50 miles – in an estimated one minute and forty-two seconds.

Arnold described the objects as flat, round, and metallic, glinting in the sun, with a crescent shape in front. Crucially, when he later relayed his experience, he stated that their motion was “like a saucer would if you skipped it across the water.” This simile, describing their peculiar, undulating flight path rather than their literal shape, would soon be misinterpreted and would quickly reshape public understanding of unidentified aerial phenomena.

A Novel Description Takes Flight

Upon landing in Yakima, Arnold shared his account with reporters. Among them was Bill Bequette, a staff writer for The East Oregonian newspaper in Pendleton, Oregon. Bequette filed a wire story detailing Arnold's claims, including his vivid description of the objects' movement. The critical phrasing, often reported as “flying saucers” or “saucer-like,” emerged from this initial press interaction.

While Arnold consistently maintained that the objects were “boomerang shaped” or “like a pie plate,” the press focused on the dynamic aspect of his simile. Early news reports, such as those carried by the Associated Press, quickly popularized the term. For instance, an Associated Press story datelined Pendleton, Ore., June 26, quoted Arnold: “I said they flew like a saucer, saucers skipping over water. I didn’t say they were saucers.” Despite Arnold’s clarification, the evocative imagery of “flying saucers” proved irresistible to headline writers and the public imagination. The term quickly spread from local papers to national publications, becoming the default descriptor for unidentified objects in the sky.

The Immediate Impact and Enduring Legacy

The immediate consequence of the press's coining and popularization of “flying saucers” was a rapid surge in similar reports across the United States and globally. People began looking for, and reporting, “flying saucers,” establishing a new category of phenomena in the public consciousness. This period marked a distinct shift from isolated reports of unexplained aerial phenomena to a widespread cultural event. Military and government officials, initially caught off guard, soon faced increasing pressure to address these reports.

The U.S. Army Air Forces responded by launching Project Sign in late 1947 to collect, evaluate, and interpret all information concerning unidentified flying objects. This marked the formal beginning of official U.S. government investigations into what would become known as UFOs. However, the term “flying saucer” continued to dominate popular discourse, influencing not only public perception but also early fictional depictions in literature and film that cemented the visual of a disc-shaped craft.

An Unresolved Moment in History

Kenneth Arnold’s June 24, 1947, sighting remains a foundational event in the history of ufology, not least because of its role in generating a defining cultural term. What Arnold actually witnessed, however, remains a subject of debate. Official explanations have ranged from mirages and atmospheric phenomena to misidentification of conventional aircraft or flocks of birds. Arnold himself maintained his account consistently until his death, providing detailed descriptions and even illustrations of what he claimed to have seen.

The documented record shows Arnold’s detailed testimony and the subsequent, rapid adoption of the “flying saucer” term by the press. What remains open is the definitive identification of the objects he observed. While the term “flying saucer” may have simplified and generalized Arnold’s original description, the event itself unequivocally ushered in the modern era of public and official engagement with unidentified aerial phenomena, establishing a timeline that continues to unfold today.