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Case FileNARA NAID 28969514 · T1206 Roll 27

Project Blue Book Case File

El Centro, CaliforniaApril 1957

Insufficient Data

Summary

Project Blue Book, the U.S. Air Force's 22-year UFO investigation program, opened a case file on a sighting reported from El Centro, California in April 1957. The full case file (3 scanned pages of witness statements, Air Force memoranda, and investigator notes) is reproduced below as held by the National Archives. The Air Force assigned this case to its broader investigation of unidentified aerial phenomena alongside ~12,600 other reports filed between 1947 and 1969. Citation: NARA Record Group 341, Microfilm Publication T1206, Roll 27.

Reported location

El Centro, California

Date of incident

April 1957

State / country

CA / US

Page count

3 scanned pages

USAF evaluation

unknown

Microfilm

T1206, Roll 27

Original case file scans

Original case file · scanned by NARAPage 1 of 3
Transcribed text
PROJECT 10073 RECORD CARD

1. DATE | 2. LOCATION | 12. CONCLUSIONS
10 April 1957 | El Centro, California | Was Balloon
 | | Probably Balloon
3. DATE-TIME GROUP | 4. TYPE OF OBSERVATION | Possibly Balloon
Local 1313 PST | X Ground-Visual | Ground-Radar | Was Aircraft
GMT 10/2113Z | Air-Visual | Air-Intercept Radar | Probably Aircraft
 | | | Possibly Aircraft
5. PHOTOS | 6. SOURCE | Was Astronomical
Yes | Civilian | Probably Astronomical
X No | | Possibly Astronomical
 | | Other
7. LENGTH OF OBSERVATION | 8. NUMBER OF OBJECTS | 9. COURSE | Insufficient Data for Evaluation
11 minutes | one | straight up | Unknown

10. BRIEF SUMMARY OF SIGHTING | 11. COMMENTS
One object, round, size of pinhead, | Preparing officer believes object
color silver, white object appeared | to be a balloon.
to be rising and rose out of sight
radar searching negative. Many a/c in
area.

ATIC FORM 329 (REV 26 SEP 52)
/ 3

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Source: National Archives Catalog · NAID 28969514

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