According to the authorities, all mine divers were outside the area of the explosion and no one was injured as a result, though the blast was felt by residents in the town of Swinoujscie.
The bomb, of the type nicknamed "Tallboy" (big boy, in English), is six meters long and was found in September past year in a canal near the Baltic Sea.
"A spokesman for its Świnoujście city hall told AFP there was" no harm" to people's wellbeing, buildings, or even the city's infrastructure.
It was dropped by the Royal Air Force in an attack on a Nazi warship in 1945. Initially, the Polish Navy dismissed the idea of making a controlled activation of the bomb, fearing that a neighboring bridge, which is about 500 meters from the site, would be destroyed during the explosion.
Experts don't know why it failed to explode at the time.
Greater than 700 folks had been evacuated from the world for the operation, which aimed to "neutralize" the explosive remotely utilizing a way known as deflagration - which includes heating the bomb till it burns somewhat than detonating it. For this, they used a remote device to pierce the outer layers of the pump, while the controllers were far away. "The object can be considered as neutralised, it will not pose any more threat", Second-Lieutenant Grzegorz Lewandowski, the spokesman of the 8th Coastal Defense Flotilla, was quoted as saying by state-run news agency PAP.
But the bomb exploded anyway, with dramatic video footage showing water shooting into the air in the Baltic Sea shipping canal.
He noted it was the biggest ever such operation by sappers in Poland, where unexploded wartime bombs, missiles and grenades are still found often. We hope that we have succeeded by giving you the full details and information.