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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 Houssen, on February 10, 2018:

Case number:



On February 9 or 10, 2018, on the website of the MUFON ufology group, in the USA, an anonymous account of someone saying that while looking out of the window at Houssen, he saw an object flying at low altitude. He took a camera and filmed the "UFO" which was about 30 meters high and started falling to a height of 10 meters.

The witness felt that the "UFO" could "disappear and become invisible, such as a portal or camouflage."

The video is visible in this file below.


Temporal data:

Date: February 9 or 10, 2018
Time: Day.
Duration: 28 seconds or more.
First known report date: February 10, 2018
Reporting delay: Hour, days.

Geographical data:

Department: Haut-Rhin
City: Houssen
Place: From near the rue du Galtz, UFO in the sky.
Latitude: 48.121
Longitude: 7.373
Uncertainty ratio: 100 m

Witnesses data:

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

Ufology data:

Reporting channel: By the web to the MUFON, USA.
Type of location: Window at the back of village house looking to countryside, UFO in the sky.
Visibility conditions: Day.
UFO observed: Yes
UFO arrival observed: No
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: Extraterrestrial or paranormal craft.


Hynek: DD
ALSACAT: Probable party ballon or plastic bag.


[Ref. mu1:] MUFON:

Long Description of Sighting Report

I looked out the window and saw a low-flying object, while I reached the camera, the UFO overcame about 500 meters at an altitude of about 30 meters and began to drop to a height of 10 meters.

I will not describe what a UFO was in detail, in the face, it could disappear and become invisible, such as a portal or masking. Five minutes later I cycled to the field where the last time I saw a UFO. No traces of the paranormal activity on this day found.

But after a while, then began to occur paranormal things always, I found a dozen different types of UFOs.

That was the show, the end.

The video is at


A black UFO flies over the city of Houssen, in Alsace

2/11/2018 01:15:00 AM | Tags : UFO

On February 10, 2018, in the middle of the day, a dark UFO was filmed over the commune of Houssen, in Haut-Rhin, in Alsace. The witness published his story and a video on the MUFON website.


"I looked out the window and saw an object flying at low altitude. I then took my camera. The UFO was about 500 meters from me and was flying at an altitude of about 30 meters. Then it started falling to a height of 10 meters.

I will not be able to describe this UFO in detail. I was able to disappear and become invisible, as if it was passing through a portal or was camouflaged. Five minutes later, I went on a bike on the field where I saw a UFO the last time. No trace of any paranormal activity to date has been found.

But after a while, it started to make paranormal things happen. I was able to observe a dozen different types of UFOs."

Watch the video

Source, 09 février 2018


The date could be February 9, 2014, instead of February 10, 2014, or any other date. The video, taken by day, has a resolution of 1280 by 740 pixels, but it is very fuzzy. At the bottom right there is a very doubtful incrustation, "XfileCommander".

There is sound, ambient noise, but no voice of any witness.

The video lasts 2 minutes 21 seconds, but only the first 28 seconds correspond to the observation, the rest being this sequence repeated in slow motion.

It was indeed taken in Houssen, from the back of one of the houses of the rue du Galtz, near the water tower:

Ci-dessus image tirée de la vidéo.

Above the place by Google Street View.

The witness was at the back of one of the houses seen on the right of the street.

The witness was filming towards the East-Southeast, so the sun was falling to the right side of the object, as shown in the video.

The object goes slightly down essentially. At first, it shows a dark side, at one point it "turns" and shows a reflecting side. The reflection seems too strong to be a reflection on a white bird's feather.

I think it can be a party balloon carried by the wind and having a dark side and a light*colored or metallized side. It could also be a plastic bag. I do not see any "controlled maneuver", the thing seems carried away by the wind.


Probable party ballon or plastic bag.

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 27, 2018 Creation, [mu1], [ap1].
1.0 Patrick Gross February 27, 2018 First published.

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This page was last updated on February 27, 2018.