An account in Savoie, France

On October 5, 2017 at 1:30 PM, a witness, lying on the ground during a physical exercise session, was surprised by the speed of an opaque white ball passing from west to east. The witness noticed no trail left in the sky by the phenomenon. No noise was heard. The observation lasted between 15 and 20 seconds. Only one testimony was collected for this phenomenon. The witness's observation could correspond to the passage of a bolide (a meteor of high luminous intensity), although we have not found formal evidence of such a passage. Daytime bolides are harder to see; some can be identified (by cameras or radar) without ever having been the subject of human testimonies. The witness's lying position, at rest (breathing exercise), likely favored the observation. The described appearance could match, but the reported duration seems long and would have required further details. The witness did not follow up on our request to fill out our questionnaire. As a result, GEIPAN is not able to further explore this hypothesis or any other. GEIPAN classifies this case as C: lack of reliable information.

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This is an official case file of GEIPAN, the French space agency's unidentified aerospace phenomena office, machine translated from French. The original text and the full investigation file are at geipan.fr. We reproduce it with thanks and remove anything on request.