Sirens
In what situations are sirens used to trigger alerts?
In the event of a nuclear or radiological accident, the population is warned via the national siren network.
Alerts are not automatically triggered throughout the country, but only in potentially threatened areas. Furthermore, depending on the circumstances (wind direction and speed, scale of releases, etc.), the three signals described below are triggered by region, municipality or locality.
The “nuclear alarm” consists of three types of sound signals:
Pre-alarm: When radioactive contamination in one or more sectors is possible but not imminent, the sirens emit the “pre-alarm” signal which consists of a modulated sound lasting one minute.
Nuclear alarm: When radioactive contamination in one or more sectors is imminent, the sirens emit the “nuclear alarm” signal which consists of a modulated sound lasting one minute interrupted by two 12-second pauses.
End of alarm: The end of an alarm is signaled by the sirens using the “end of alarm” signal, which consists of a continuous sound lasting one minute.
Sirens are an effective way of warning of a major or imminent danger. However, you can obtain more detailed information about that danger via other warning channels such as the “LU-Alert” mobile application, the www.lu-alert.lu website, other government websites or the media.
If you have not found the answer to your question among the questions above, please consult the other sections of “All about LU-Alert”. If you do not find the answer to your question there either, you can contact us directly using the contact form by clicking on the link below.
The LU-Alert mobile app
With the “LU-Alert” app, you can follow all the alerts and information issued by the public authorities via the national warning and information system for the population (LU-Alert).
Download the application free of charge from the Apple App Store and the Google Play Store.
