A 62-year-old man is lucky to be alive following an afternoon explosion in the southeast.

The unidentified man was working on a diesel slip tank near a home in the 330 block of Doverthorn Rd. S.E., in the community of Dover, when the tank exploded.

The experienced boilermaker was welding a new fitting on when it blew, sending the heavy steel tank more than 6 metres in the air. The tank came back down and landed on him.

According to one witness, the man was transported to hospital with an apparent broken hip. The witness said the boilermarker had taken proper safety precautions and filled the tank with water to replace any remaining fuel.

An investigation into the incident is underway.