Project 10073 Record Card — Narsarssuak AB, Greenland, 23 July 1954

On 23 July 1954, personnel at Narsarssuak Air Base in Greenland observed a series of unidentified aerial phenomena described as gray 'puffs.' The objects were first sighted at 1630Z at a bearing of 285 degrees true. Over the course of the observation, the puffs were seen moving clockwise around the horizon to 25 degrees true. The phenomena typically appeared in pairs, forming within three seconds and dissipating within twelve seconds. Three aircraft were dispatched to investigate the sightings, and observers reported seeing at least 40 of these puffs. The observers noted that the puffs were similar in size and appearance to flak bursts. Despite the unusual nature of the sightings, the weather conditions were reported as excellent for observation, with 25 miles of visibility. Local weather forecasters were consulted and stated that the phenomena were definitely not weather-related. Following the investigation, the official conclusion reached by the military authorities was that the sightings were attributable to flak bursts. The report emphasizes that experienced observers found the similarity to flak to be remarkable.