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ALSACAT is my comprehensive catalog of UFO sighting reports in Alsace, the region is the North-East of France, whether they are "explained" or "unexplained".

The ALSACAT catalog is made of case files with a case number, summary, quantitative information (date, location, number of witnesses...), classifications, all sources mentioning the case with their references, a discussion of the case in order to evaluate its causes, and a history of the changes made to the file. A general index and thematic sub-catalogs give access to these Alsatian case files.

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Case of Strasbourg, on May 23, 1974:

Case number:



In the archive of the French ufology magazine Lumières Dans La Nuit, there is a case dated May 23, 1974, in Strasbourg:

At 5:30 p.m., Mr. Richard C. saw from a window on the 13th floor of a building in the Neudorf district, to the east, a "fairly large" dot of light of "light white" color, doing some fairly short ups and downs for a few seconds, then rising much faster, sideways, north, and disappearing.


Temporal data:

Date: May 23, 1974
Time: 05:30 p.m.
Duration: ?
First known report date: In the 1970's.
Reporting delay: Day, years.

Geographical data:

Department: Haut-Rhin
City: Strasbourg
Place: From window of 13th floor of building in the Neudorf district.
Latitude: 48.565
Longitude: 7.763
Uncertainty radius: 1 km.

Witnesses data:

Number of alleged witnesses: 1
Number of known witnesses: 1
Number of named witnesses: 0
Witness(es) ages: ?
Witness(es) types: Male.

Ufology data:

Reporting channel: Ufology archive LDLN.
Type of location: Building 13th floor.
Visibility conditions: Day.
UFO observed: Yes.
UFO arrival observed: ?
UFO departure observed: Yes.
Entities: No.
Photographs: No.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: ?
Witnesses interpretation: ?


Hynek: DD
ALSACAT: Insufficient information, low strangeness.



MAY 23, 1974.-


Hour: at 05:30 p.m.

Mr. Richard C. sees from STRASBOURG-NEUDORF through a window on the 13th floor of a building, towards the EAST (Germany) a rather large bright dot of light white color, making a few fairly short ascents and descents for a few seconds, then rise much more quickly, obliquely towards the NORTH and disappear.

(Reported by M. Mary C.)



The information is rather poor, and there has been no investigation as far as I know.

The strangeness of the report is low, it could have been a helicopter for example.


Insufficient information, low strangeness.

Sources references:

* = Source is available to me.
? = Source I am told about but could not get so far. Help needed.

File history:


Main author: Patrick Gross
Contributors: None
Reviewers: None
Editor: Patrick Gross

Changes history:

Version: Create/changed by: Date: Description:
0.1 Patrick Gross September 12, 2023 Creation, [ald1].
1.0 Patrick Gross September 12, 2023 First published.

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This page was last updated on September 12, 2023.