Now we have limited options for this blast, since nothing stored there could have possibly done this.

1. A satellite deployed "rod from God"

2. A nuclear weapon

3. A scalar or other type weapon.

Whatever I don't know about, but this was NOT an accident and the fracture pattern around the crater proves a sub ground burst. If it was a sub ground burst, then a small nuclear weapon is a possibility because once a nuke has to push dirt, the blinding flash will not happen. This could also be the result of a "rod from God" if that weapons system really exists.
A little bit more of a detailed explanation: If the blast happened at ground level, almost all of the energy would go upwards and the blast would not have made a large deep crater, especially one large enough and deep enough to make that lake. If you look to the right hand side of the lake, you can see fracture patterns in the earth, which were caused by the earth being compressed sideways and not downwards. This would only be done with a sub surface blast. After the blast, the earth bounced back towards the center of the lake, which opened up the cracks.

That type and size of blast crater will only happen if a massive bomb goes off underground, which leaves scant few options, 1. A "rod from god" (so far not proven weapons system which drops tungsten rods from a satellite in outer space, which impact at 10 KM/second) OR a small nuclear weapon that was either dropped in a ground penetrating bomb, or placed underground, waiting for the right event. Take your pick, I do not have all the answers but I will say this affirmatively: No chemical blast did that, PERIOD.

http://82.221.129.208/ab5index.html