Documents / FOIA release

(Analysis of Reports of Unidentified Aerial Objects)

Central Intelligence Agency · 2005-07-12 · 312 pages · text by OCR

This CIA-released copy of Project Blue Book Special Report No. 14 is dated 5 May 1955 and comes from the Air Technical Intelligence Center at Wright-Patterson Air Force Base. It is a statistical analysis of about 4,000 unidentified aerial object reports from 1947 through 1952, coded onto IBM punched cards with the help of a panel of scientists. The report concludes that such objects were highly unlikely to be technological developments beyond present-day scientific knowledge. It also found no valid evidence of physical matter.

Open the PDF at page 250 Original source ↗ 
# Approved For Release 2005/07/20 : CIA-RDP81R00560R000100060001-5

Evaluation	TOTAL	NORTH AMERICA	SOUTH AMERICA	EUROPE
Number	Per Cent	Number	Per Cent	Number	Per Cent
Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total
0-Balloon	270	179	449	8.4	5.6	14.0	251	169	420	8.4	5.7	14.1	0	0	0	0.0	0.0	0.0	12	1	13	15.0	1.3	16.3
1-Astronomical	475	341	816	14.8	10.7	25.5	443	329	772	14.9	11.1	26.0	4	0	4	40.0	0.0	40.0	3	4	7	3.8	5.0	8.8
2-Aircraft	354	288	642	11.1	9.0	20.1	343	260	603	11.6	8.8	20.4	2	0	2	20.0	0.0	20.0	5	11	16	6.3	13.8	20.1
3-Light Phenom.	82	24	56	1.0	0.8	1.8	31	23	54	1.0	0.8	1.8	0	0	0	0.0	0.0	0.0	0	1	1	0.0	1.3	1.3
4-Birds	19	10	29	0.6	0.3	0.9	14	9	23	0.5	0.3	0.8	0	0	0	0.0	0.0	0.0	0	1	1	0.0	1.3	1.3
5-Clouds, Dust, etc.	12	13	25	0.4	0.4	0.8	9	13	22	0.3	0.4	0.7	0	0	0	0.0	0.0	0.0	0	0	0	0.0	0.0	0.0
6-Insuffic. Info.	298	0	298	9.3	0.0	9.3	271	0	271	9.1	0.0	9.1	2	0	2	20.0	0.0	20.0	16	0	16	20.0	0.0	20.0
7-Psychological	38	10	48	1.2	0.3	1.5	38	9	47	1.3	0.3	1.6	0	1	1	0.0	10.0	10.0	0	0	0	0.0	0.0	0.0
8-Unknown	689	0	689	21.5	0.0	21.5	638	0	638	21.5	0.0	21.5	1	0	1	10.0	0.0	10.0	14	0	14	17.5	0.0	17.5
9-Other	112	35	147	3.5	1.1	4.6	97	22	119	33	0.7	4.0	0	0	0	0.0	0.0	0.0	3	9	12	3.8	11.3	15.1
 AERICA	AERICA	AUSTRALIA
Evaluation	Number	Per Cent	Number	Per Cent	Number	Per Cent	Number	Per Cent
Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total
0-Balloon	7	8	15	6.1	7.0	13.1	0	1	1	0.0	4.0	4.0
1-Astronomical	18	7	25	15.7	6.1	21.8	7	1	8	28.0	4.0	32.0
2-Aircraft	4	10	14	3.5	8.7	12.2	0	7	7	0.0	28.0	28.0
3-Light Phenom.	1	0	1	0.9	0.0	0.9	0	0	0	0.0	0.0	0.0
4-Birds	5	0	5	4.3	0.0	4.3	0	0	0	0.0	0.0	0.0
5-Clouds, Dust, etc.	3	0	3	2.6	0.0	2.6	0	0	0	0.0	0.0	0.0
6-Insuffic. Info.	4	0	4	3.5	0.0	3.5	5	0	5	20.0	0.0	20.0
7-Psychological	0	0	0	0.0	0.0	0.0	0	0	0	0.0	0.0	0.0
8-Unknown	32	0	32	27.8	0.0	27.8	4	0	4	16.0	0.0	16.0
9-Other	12	4	16	10.4	3.5	13.9	0	0	0	0.0	0.0	0.0
 TOTAL	NORTH AMERICA	SOUTH AMERICA	EUROPE
Evaluation	Number	Per Cent	Number	Per Cent	Number	Per Cent	Number	Per Cent
Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total
0-Balloon	228	150	378	6.9	5.9	148	214	143	357	9.0	6.0	15.0	0	0	0	0.0	0.0	0.0	7	1	8	10.9	1.6	12.5
1-Astronomical	382	256	638	15.0	10.0	25.0	359	246	605	15.1	10.4	25.5	2	0	2	25.0	0.0	25.0	3	4	7	4.7	6.3	11.0
2-Aircraft	292	235	527	11.4	9.2	20.6	281	21.3	494	11.9	9.0	20.9	2	0	2	25.0	0.0	25.0	5	8	13	7.8	12.5	20.3
3-Light Phenom.	32	21	53	1.3	0.8	2.1	31	20	51	1.3	0.8	2.1	0	0	0	0.0	0.0	0.0	0	1	1	0.0	1.6	1.6
4-Birds	13	10	23	0.5	0.4	0.9	11	9	20	0.5	0.4	0.9	0	0	0	0.0	0.0	0.0	0	1	1	0.0	1.6	1.6
5-Clouds, Dust, etc.	3	7	10	0.1	0.3	1.9	2	7	9	0.1	0.3	0.4	0	0	0	0.0	0.0	0.0	0	0	0	0.0	0.0	0.0
6-Insuffic. Info.	261	0	261	10.2	0.0	10.2	236	0	236	10.0	0.0	10.0	2	0	2	25.0	0.0	25.0	14	0	14	21.9	0.0	21.9
7-Psychological	36	9	45	1.4	0.4	1.8	36	8	44	1.5	0.3	1.8	0	1	1	0.0	12.5	12.5	0	0	0	0.0	0.0	0.0
8-Unknown	497	0	497	19.5	0.0	19.5	455	0	455	19.2	0.0	19.2	1	0	1	12.5	0.0	12.5	11	0	11	17.2	0.0	17.2
9-Other	92	28	120	3.6	1.1	4.7	79	20	99	3.3	0.8	4.1	0	0	0	0.0	0.0	0.0	3	6	9	4.7	9.4	14.1
 ASIA	AERICA	AUSTRALIA
Evaluation	Number	Per Cent	Number	Per Cent	Number	Per Cent	Number	Per Cent
Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total	Certain	Doubtful	Total
0-Balloon	7	5	12	7.9	5.6	13.5	0	1	1	0.0	4.7	4.7
1-Astronomical	12	5	17	13.5	5.6	19.1	6	1	7	28.6	4.7	33.5
2-Aircraft	4	10	14	4.5	11.2	15.7	0	4	4	0.0	19.0	19.0
3-Light Phenom.	1	0	1	1.1	0.0	1.1	0	0	0	0.0	0.0	0.0
4-Birds	2	0	2	2.2	0.0	2.2	0	0	0	0.0	0.0	0.0
5-Clouds, Dust, etc.	1	0	1	1.1	0.0	1.1	0	0	0	0.0	0.0	0.0
6-Insuffic. Info.	4	0	4	4.5	0.0	4.5	5	0	5	23.8	0.0	23.8
7-Psychological	0	0	0	0.0	0.0	0.0	0	0	0	0.0	0.0	0.0
8-Unknown	26	0	26	29.2	0.0	29.2	4	0	4	19.0	0.0	19.0
9-Other	10	2	12	11.2	2.2	13.4	0	0	0	0.0	0.0	0.0
	</td

* SEE FOOTNOTE ON NEXT PAGE.

Cases discussed

About this file

FOIA release, from the cia-readingroom collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 312 pages are in the text index: search them above, or from the library's search.