My first thought is I’d like to see the video.
There are several videos of this event now published by the news services. Some of them caught the entire sequence of the explosion and it was indeed massive.
Nobody within 500 feet of that blast could have survived.
Again, I wonder where that first video came from that shows a fire that supposedly started the explosion. The cameraman could not have survived. I don't see how even the camera could have survived.
Perhaps somebody who has more experience with explosions can offer an explanation.