Silent Gibbon siren situation explained by city administrator Thu, 01/11/2024 - 12:00am For many years, residents of Gibbon have grown accustomed to hearing the city’s sirens sound at 7:00 a.m., 12:00 noon,PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today! Read more about Silent Gibbon siren situation explained by city administrator