Testing sirens

Repeat siren test 2018

The Siren Test 2018 will be repeated on Wednesday, May 23, 2018. According to the Swiss National Siren Test of February 7, 2018 at the control system Polyalert, a technical failure occurred and, as a result, the Federal Office for Civil Protection (FOCP) has decided that the siren test will be reintroduced after the error has been resolved. The repetition is to ensure the functionality of Polyalert and the entire alarm system.

Test day: first Wednesday in February

Every year, on the first Wednesday in February, all sirens across Switzerland are tested. The public is notified beforehand through announcements on the radio, on TV and in the press. The general public is not required to respond in a particular way or take protective measures, but simply requested in advance to excuse the inconvenience caused by the noise of the sirens.

Two alarm signals

At 1.30 p.m. the ‘general alert’ signal is sounded throughout Switzerland. This is a regular ascending and descending tone, which lasts for one minute, and is repeated once after a two-minute interval. Where necessary, the sirens can continue to be tested until 2 p.m. From 2.15 to 3 p.m. (at the latest), the „water alert“ signal is tested in those areas that are close to dams. It consists of twelve low continuous tones lasting twenty seconds and repeated at ten-second intervals. The function of a total of 7,200 sirens is tested.

Federal Office for Civil Protection FOCP Monbijoustrasse 51A
CH-3003 Bern
+41 58 462 50 11


Print contact

Federal Office for Civil Protection FOCP

Monbijoustrasse 51A
CH-3003 Bern

Show map