I don't know the exact spot, because it was still taped off when we left Norman this afternoon, but here is a satellite photo of the area. Of course, you can see the stadium. I'm not sure how to describe the spot of the explosion to you on the photo, but if you look at the stadium, go to the left (west) stands, where they extend further out; follow in a straight line to the left to the first building with a very white roof (before the tree-lined mall area.); this is almost a t-shape with two different buildings, and I believe the bomb went off in the area north of that, in the shadow of that building on this photo.
It is paved (sidewalks.) Most explosions will (generally) follow the path of least resistance; in other words, they will not make a crater. Artillery shells have significant downward force from their trajectory that causes them to penetrate the ground. Even the Murrah building bomd, whose force destroyed a building, did not crater the street, so far as I know.
There was a rather large crater in the street in front of the Murrah Building
To all in Norman, I hope tomorrow is a better day for you and you can return to somewhat normal in the next couple of days.
Thanks for the satellite photo. If another bomb just went off, that would strengthen the theory, no?