Project Blue Book Sighting Report — Mauch Chunk, Pennsylvania, July 15, 1952

This Air Intelligence Information Report details a series of sightings of an unidentified aerial object near Mauch Chunk, Pennsylvania, on July 15, 1952. The primary witnesses, a railroad trainman and a reporter, observed a small, luminous object that displayed erratic movement, including elliptical orbits and bobbing motions. The object was described as changing colors, shifting between yellow, red, orange, green, and blue-green. The witnesses, who were noted by the investigating officer as having experience with aircraft and aerial phenomena, observed the object both with the naked eye and through binoculars. The sighting lasted for several hours, beginning around 00:20 EDT. During the observation, the witnesses noted that the object remained in a relatively localized area, though it appeared to move in relation to stationary objects. The witnesses also observed commercial and military aircraft in the vicinity, which they were able to distinguish from the unidentified object based on the aircraft's steady navigation lights compared to the object's flickering and color-changing characteristics. The report includes statements from the observers, who were both in the vicinity of Lehighton and Mauch Chunk at the time. The investigating officer, 2d Lt. John L. Spizel, noted that there was no prior local publicity that might have influenced the reports, and dismissed the possibility of local hysteria. Despite the witnesses' credibility and the favorable weather conditions—clear skies with 12 miles of visibility—the Air Intelligence Office at Olmsted Air Force Base concluded that it was unable to provide an explanation for the sighting and remained non-committal regarding the nature of the object. The report includes an aeronautical chart as an enclosure to assist in the evaluation of the sighting location.