[link to www.nuclearsecrecy.com]

Using this map and some other calculations it seems that our explosion was somewhere in the vicinity of what you would expect from a 100 pd detonation device, which is approximatly the size of a hellfire missile. Not saying i think it was...but if.

[link to www.sciencelab.com]

Use the blast radius to adjust detination zone and extrapolate from there, 1st link. I eyeballed a 3 house-blast radius to come up with 100 pds. I have no idea how to convert that to weight/volume in gas correlation.