"We inform you that we have received reports of suspected audible explosions at various locations in our county. Action is presently underway to verify this information. We ask the residents to stay calm. As shortly as the details are established, we will inform immediately about the results of our actions" - the police in Konin initially stated.
An crucial announcement from the police on applications in Wielkopolska
After a small while, it turned out to be fighter noises. "We ask you to stay calm – there is no threat to the residents. We inform that the noises heard in various places of our territory were caused by the flight of the Allied Forces of Poland, which crossed the sound barrier" – calmed the inhabitants of KMP Konin.
The plane crosses the sound barrier erstwhile it starts moving faster than sound waves. This velocity is about 1224 km/h. At the minute erstwhile the device reaches and exceeds this limit, a shock wave is formed, and residents of a given area hear a characteristic, loud bang, or alleged sound thunder.
It's not an explosion, it's a natural physical effect accompanying the flight at supersonic speed.
