Documents / Official release
This U.S. Department of War file collects Project Sign era checklists and incident summary sheets for incidents 101 to 172. The largest item is the 18 February 1948 explosion over Norcatur, Kansas. For it the file gathers witness statements, speculative letters from Norman G. Markham, and Dr. Lincoln LaPaz's view that it was a genuine meteorite fall with curious aspects. Other entries cover B-29 crews, a two-decked wingless object over the Netherlands, a Turkish rocket report, a Moscow sighting, and George Gorman's 1 October 1948 Fargo encounter.
From the source:Release of 2026-05-08 Incident: N/A, N/A. NARA Record Group 38, catalogue id 143685. Each of these incident summaries includes a "Check-List - Unidentified Flying Objects" that contains details about the incident. Many summaries also include witness lists or statements and other narrative reports or descriptions.
Read from the scan by GLM-OCR; expect the odd misread word.
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS
Incident #
1. Date 18 February 1948
2. Time 1500 MST
3. Location Air near Green River Utah
4. Name of observers Capt. Howard H. Berodt - Capt Maurice T. Ritenour (See Inc 102 - corrbration)
5. Occupation of observer Pilots
6. Address of observer 718th Bomb Sq, 28th Bomb Gp (VH) Weaver AFB, S.D.
7. Place of observation $ 3 9^{\circ} \mathrm{N}-1 0 0^{\circ} \mathrm{W} $ - Near Green River, Utah
8. Number of objects one
9. Distance of object from observer 100 miles
10. Time in sight N/S
Altitude 20,000 feet
Spood Very high
13. Direction of flight Southeast (of Limon, Colorado)
Tactics Explosion rate
15. Sound Could not be determined due to B-29 engine noise
Size Huge (Seen 100 miles west of the B-29's)
17. Color Multi-colored ball of fire
18. Shape Hugh multi-colored ball of fire and dense cloud of smoke followed
19. Odor detected N/S
Apparent construction N/S
Exhaust trails Vapor trail with a ball of fire at the head of trail
Weather conditions Clear
23. Effect on clouds N/S
24. Skotches or photographs None
25. Manner of disappearance N/S
26. Remarks: News - Same as incident 102 which see Official release, from the pursue collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 178 pages are in the text index: search them above, or from the library's search.