If you wonder why you hear an alarm and/or your phone is beeping

At noon the government is testing the Emergency Alert System in Norway.

Today at 12.00 PM, the Emergency Alert System will be tested on the mobile telephone network while the physical warning sirens/warning systems will be activated throughout Norway, in a national warning system test.

More info in English: https://www.emergencyalert.no/test-of-the-emergency-alert-system/