When is the alarm activated? Klara Hansen October 03, 2018 08:39 Updated The alarm in Norrsken House activates at 12 midnight every weekday and it is on during weekends. Related articles How do I work the alarm? What do I do in case of emergency? How do I delay the alarm activation if I stay after-hours? When is Norrsken House open? SATS membership Comments 0 comments Please sign in to leave a comment.