Guinness World Records:

Taking place in Erfoud, Morocco, the blast had a total yield of 68.47 tonnes of TNT equivalent and was the result of detonating 8,418 litres of kerosene with 33 kg of powder explosives – and it lasted for over 7.5 seconds.

I saw and enjoyed this movie and, while watching this scene, I thought, “That seems like a very big, long explosion!” I didn’t realize it was a world record-setting stunt.