Beträffande ljusfenomen (Regarding light phenomenon) — Gothenburg, September 1946

This document is a formal report issued by the Gothenburg Defense District (Göteborgs Försvarsområde) on September 11, 1946, addressed to the Air Defense Department of the Defense Staff in Stockholm. The report details a sighting of a light phenomenon reported by a dentist named Mesterton, residing in Kungsbacka. The sighting occurred on the evening of September 10, 1946, at 19:55. The location of the event was identified as the Onsala coast (Onsalakusten), specifically 100 meters from 'H' in Häcklahagen. The witness described the object as having a blue-green glow (blågrönt sken) and estimated its altitude at approximately 300 meters. The object was observed moving from a direction of south or south-southeast toward north or north-northeast, eventually disappearing toward the horizon. The document is signed by E. Grill, the Defense District Commander, with a secondary signature by B. Brolin.