Martinsburg, West Virginia UFO Sighting (December 11, 1946) — USAF Files
U.S. government documents record an unidentified object observed at high altitude near Martinsburg, West Virginia, in late 1946.
Historical Context
The Martinsburg sighting occurred during a period of significant transition in aerial surveillance and atmospheric study. Following the conclusion of the Second World War, the global landscape was marked by the early stages of the Cold War, an era characterized by heightened-state vigilance regarding airspace integrity. During the war years, Allied aircrews had frequently reported encounters with “foo-fighters,” which were described as luminous, unidentified objects that appeared to pace or shadow bomber formations. These reports created a precedent for documenting unexplained aerial phenomena, as military personnel struggled to differentiate between enemy technology, natural phenomena, and unknown physical anomalies.
In the mid-to-late 1940s, the United States began implementing more structured methods for tracking unidentified objects. This period saw the rise of sophisticated radar technology and the beginning of specialized atmospheric research. However, the scientific understanding of the upper atmosphere was still evolving, and many sightings from this era were often attributed to the burgeoning field of high-altitude ballooning or the presence of bright celestial bodies. The geographical region of West Virginia, situated within the Appalachian corridor, provided a landscape where atmospheric conditions and topographical features could occasionally create optical illusions or obscure the true nature of high-altitude objects.
The Incident
On December 11, 1946, at approximately 2245 hours, an unidentified object was observed 40 miles northwest of Martinsburg, West Virginia. According to U.S. Department of Defense documents, the object was traveling at an estimated speed of 160 knots. The object maintained an altitude of 36,950 feet while moving on a heading of 125 degrees. In relation to the observing aircraft, the object was positioned approximately 20 miles ahead at the 12 o’clock position. While the specific number of witnesses to this event is not specified in the released documentation, the event was formally recorded by U.S. government investigators.
The details of this encounter were not made available to the general public for decades. The information was eventually released on May 8, 2026, as part of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE). This release provided a rare glimpse into the specific telemetry and positional data maintained by government agencies regarding unidentified aerial phenomena.
Analysis and Classification
The Martinsburg case is classified as a visual sighting reported by ground or air observers. Within the framework of modern UAP studies, the case remains categorized as unresolved. Under the protocols of the All-domain Anomaly Resolution Office (AARO), all records released via the PURSUE program are designated as unresolved by default. This designation indicates that the federal government has not reached a definitive conclusion regarding the nature of the object, leaving both anomalous and conventional explanations on the table.
When evaluating sightings from the late 1940s, researchers often consider several conventional candidates. During this era, the deployment of the Project Mogul series of high-altitude balloons was active, which could potentially mimic the appearance of unidentified objects on radar or via visual observation. Other possibilities include atmospheric optical phenomena, such as lenticular clouds or sundogs, as well as astronomical objects like the Moon, Venus, or meteors positioned near the horizon. Additionally, the presence of experimental aircraft, which were being developed in the post-war period, remains a standard consideration in the investigation of high-altitude sightings from this timeframe.