Declassified UFO / UAP Document
PROJECT 10073 RECORD CARD — Dolinsk, USSR, October 1957
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AI-Generated Summary
A civilian in Dolinsk, USSR, reported a loud sound and a light in the sky in October 1957. The official conclusion was that there was insufficient data to identify the object, though a sonic boom was suggested as a possibility.
This document is a Project 10073 Record Card detailing a civilian sighting in Dolinsk, USSR, in October 1957. At 1915 hours, an unnamed civilian witness reported hearing a 'tremendous sound' that caused their house to shake. Upon going outside, the witness observed a light high in the western sky. The object disappeared shortly after the initial observation. The official assessment provided on the card suggests that the phenomenon was possibly a jet aircraft breaking the sound barrier, resulting in a sonic boom. However, the report explicitly states that there was insufficient data available to reach a definitive conclusion regarding the nature of the sighting.
Possible jet breaking sound barrier with accompanying sonic boom. Insufficient data for evaluation.
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Official Assessment
Possible jet breaking sound barrier with accompanying sonic boom. Insufficient data for evaluation.
The witness reported a loud sound that caused their house to shake, followed by the observation of a light in the western sky. The investigating body concluded that the event was likely a sonic boom caused by a jet aircraft, but noted that there was insufficient data to confirm this.