>>11981422what
>>11981920 said
If you use some basic dimensional analysis and back of the envelop calculations, you get that the energy of the detonation should be of order
E ~ ? R^5/t^2 where ? is the density of the air in kg/m^3, R is the radius of a sphere defined by the shockwave in m, and t is the time after detonation in s.
Which means if you have an accurate scale and can measure the radius of the shock at several different times after the detonation, you can plot ? R^5 vs t^2 and if the behavior is roughly linear shortly after the blast, then the slope of your line should be the energy in joules. (again, order of magnitude estimate). Look up the height of that building near the blast and you can use that as a px to m calibration, then take half the cross length of shockwave sphere as your radius.
