Incident #102 Sighting Report — Green River, Utah, 18 Feb 1948

This document is an official incident report, designated as Incident #102, concerning an aerial observation that occurred on February 18, 1948, at 1500 MST. The sighting took place in the vicinity of Green River, Utah. The report identifies the source of the information as United States Air Force (USAF) pilots. According to the report, the observers witnessed a single, huge, multi-colored ball of fire accompanied by a dense cloud of smoke. The object was estimated to be at an altitude of 20,000 feet and was described as traveling at a very high speed. The report notes that the object exhibited an explosion rate. The document is associated with the Air Technical Intelligence Center (ATIC) and is part of the Project Sign collection. The report is brief and provides basic descriptive data regarding the object's appearance and flight characteristics as observed by the military personnel.