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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 11, 1979:

Case number:



The newspaper Le Républicain Lorrain for May 13, 1979, reported that a "strange colored rain fell", on May 11, 1979, on a district of Strasbourg, smearing a hundred cars small purple spots, and that "first analyzes suggest that it is a non-toxic product."

The newspaper estimated that the cloud at the origin of this rain, which followed a period of nice weather, could have formed at a certain distance from Strasbourg and have been pushed by a south-easterly wind. The newspaper mentioned that a similar phenomenon had occurred in early May in Lyon, in the Guillotière district, where a blue rain had also stained cars.

This obviously does not appear to be a "UFO sighting" at all but was nevertheless published in a ufology magazine, Ufologia, of the Cercle Français de Recherches Ufologiques (CFRU), in issue #22 of April - May - June 1980.


Temporal data:

Date: May 11, 1979
Time: ?
Duration: ?
First known report date: May 13, 1979
Reporting delay: 2 days.

Geographical data:

Department: Bas-Rhin
City: Strasbourg
Latitude: 48.574
Longitude: 7.738
Uncertainty ratio: 4 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: The Peess.
Type of location: City.
Visibility conditions: ?
UFO observed: No.
UFO arrival observed: N/A.
UFO departure observed: N/A
Entities: No.
Photographs: No.
Sketch(s) by witness(es): No.
Sketch(es) approved by witness(es): No.
Witness(es) feelings: ?
Witnesses interpretation: ?


Hynek: N/A




Purple rain on Strasbourg

A strange colored rain fell on a district of Strasbourg on Friday, smearing a hundred cars with small purple spots. The first analyzes suggest that this is a non-toxic product.

The cloud at the origin of this rain, which followed a period of nice weather, could have formed some distance from Strasbourg and have been pushed by a south-easterly wind.

At the beginning of the month, a similar phenomenon occurred in Lyon, in the Guillotière district, where blue rain had also stained cars.

"Républicain Lorrain" 5/13/79



Ancient tales speak of rains of various colors, notably red, and often interpreted as "rains of blood".

A more recent case, widely publicized, occurred in the Kerala region of India in 2001. Only around 2006, red rains were studied by observing drops under a microscope, in which scientists said they saw cells, or "cells without DNA", or even cells of "extraterrestrial origin"... ie, "microscopic particles resembling biological cells, possibly originating from fragments of comets." More serious studies have shown that they were algal spores of very terrestrial Trentepohlia lichens, dispersed in the atmosphere.

For this case of Strasbourg, it is obvious that the data is insufficient, we do not even know who would have carried out "the first analyzes" which suggested "that it is a non-toxic product."

One thing is quite certain for me: the link with the UFO question seems to me the most tenuous.


Not UFO-related.

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 August 1, 2022 Creation, [ufa1].
1.0 Patrick Gross August 1, 2022 First published.

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This page was last updated on August 1, 2022.