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As its name suggests, 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.

Case of the center of Alsace, on October 31, 2008:

Case number:



On October 31st, 2008, an anonymous person posted on Youtube a video showing green lights, writing that it is a UFO observed on October 31, 2008 in the center of Alsace, during "about 1 minute before the light source disappeared."


Temporal data:

Date: October 31, 2008
Duration: 26 seconds to 1 minute.
First known report date: October 31, 2008
Reporting delay: Minutes, hours.

Geographical data:

Department: ?
City: ?
Place: In the center of Alsace.
Latitude: 48.259
Longitude: 7.449
Uncertainty ratio: 60 km

Witnesses data:

Number of alleged witnesses: ?
Number of known witnesses: ?
Number of named witnesses: ?
Witness(es) ages: ?
Witness(es) types: ?

Ufology data:

Reporting channel: Video posted on Youtube.
Type of location: ?
Visibility conditions: ?
UFO observed: Yes
UFO arrival observed: ?
UFO departure observed: ?
Entities: No
Photographs: Yes.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: ?
Witnesses interpretation: UFO.


Hynek: NL
ALSACAT: Possible hoax, green LEDs.


[Ref. yo1:] ON "YOUTUBE":

UFO france alsace (UFO)

9 601 views


Added Oct. 31, 2008

UFO observed on October 31, 2008, in the center of Alsace (France) , the observation lasted about 1 minute before the source of light disappeared.


The alleged witness is a young man from the SÚlestat area.

During the 26 seconds of the video, there is no change of aspect of the green lights, only camera shakes. Increase of luminosity and/or contrast reaveals nothing around the lights.

I may think that this is not a "UFO" - whatever that may mean, but, for example, green leds of I do not know what electronic device, such as a TV decoder or mobile phone or computer etc.


Possible hoax, green LEDs.

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 February 17, 2018 Creation, [yo1].
1.0 Patrick Gross February 17, 2018 First published.

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This page was last updated on February 17, 2018.