Fireball and Midair Blasts over Northern Utah

The fireball came down fast on the morning of 5 April 1949. It was brilliant, bluish at first and then white, and people saw it from Salt Lake City north into Cache Valley. At about 09:45 to 10:00 loud explosions went off in midair and rattled windows around Corinne, Brigham City and Ogden. Witnesses saw puffs of bluish-white smoke that hung in the sky for a long time.

Ted Martin, chief controller in the Salt Lake City Municipal Airport tower, saw it with his assistant. So did a Utah State Highway Patrolman on duty at Mantua and a lieutenant of the Logan City Police. Cliff Nielson, a Logan newspaper correspondent, reported it too. A Logan power-line worker described a triangular object that changed colour from blue to purple, orange, yellow and green. A farmer at Cornish saw a silvery object coming almost straight down.

What is on the record

The Air Force Office of Special Investigations at Hill Air Force Base investigated for Project Grudge. Its report is in Project Blue Book's 1949 files with a copy of the United Press story "Balls of Fire Explode in Midair Over Wide Utah Area". The tower controllers and a mathematics professor at the University of Utah all thought it was a meteor. The record card concludes meteor.

The card also notes bombing practice. The airdrome officer at Hill had reported that three B-29s from Castle Air Force Base were dropping practice bombs on the Carrington Island range from 29,000 feet between 09:00 and 11:30. Some of the explosions may have come from that, and the file does not separate them.

Two county sheriffs listed as witnesses in the archive's machine record only passed reports on, so they are not counted here. A Salt Lake Tribune story about the FBI's flying-disc file dates the bureau's cable 4 April. The Air Force file and the wire story both say 5 April. The sighting does not appear in NICAP or the Hatch database.

Why it sits where it does

L4 · OFFICIAL RECORD: a released government record names who saw it. Five witnesses are identified: Martin, his assistant controller, the Mantua patrolman, the Logan police lieutenant and Nielson. Most civilian names in the file are withheld, and the archive has nothing from outside it. The tier measures sourcing, not truth. The record card's answer is a meteor, with bombing practice under way at the time.