[portofcall]

First I just want to say that I agree with you, that was an explosion; explosion and detonation aren’t necessarily the same thing. Loud noise and rapidly expanding gas = explosion. One correction though, which is that a shockwave is supersonic, and just judging by the fact that burning fragments were on the floor and not punching through the wall, I’ll guess it wasn’t supersonic.

Still an explosion!

[jacquesm]

Ah I wasn't aware of that distinction, I thought a shockwave was any sudden rise and subsequent fall in pressure. Learn a new thing every day, thank you!

[portofcall]

My pleasure, and by the way, I really enjoy your blog. You have an interesting perspective and you write very well.