AnomalyOn April 28, 2008, at around 4:10 a.m., a witness heard a dull, rolling sound coming from the northeast. This sound turned into a thunder-like noise that lasted for 5 to 6 seconds as it passed over the dwelling, frightening the witness. The sound then moved away toward the southwest. That day, significant thunderstorm activity was recorded in the area where the witness lived. The witness heard a clap of thunder caused by a violent storm.
Yvelines, France · 2008-04-28 · from the GEIPAN archive
An account in Yvelines, France
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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.