Alarm sirens tested in St Petersburg, Russia

Magnitude 5.6 earthquake triggers alarm sirens in Indonesia

Officials apologise after sirens 'triggered by technical fault' alarm residents in southern China

Nighttime tsunami warning sirens sound after Alaska earthquake

Alaska earthquake triggers tsunami warnings as sirens play to residents

Alaska earthquake triggers tsunami warning and sirens sound

Alaska earthquake triggers tsunami warning and sirens

Truck ignores sirens and smashes into ambulance at busy junction