This is an attemp to calculate the AP from this http://2.bp.blogspot.com/-_CK4MNOwJno/Tm1cQnddAtI/AAAAAAAADcI/1L804bUCX5s/s16000/025.jpg explosion provoked by Adam Arclight (Needless). There aren't too amny refernces in the pic but the Simeon tower and some buildings, I decided to use the Simeon tower as a reference using these pages http://2.bp.blogspot.com/-wM1DZ-Re-lg/T0DbQwKG5fI/AAAAAAAAGXk/RnfCtTeexBs/s16000/018.png and http://2.bp.blogspot.com/-ZBc5CDU7HV8/Tm1EdI2P4rI/AAAAAAAACL4/9UFvgDlrHa0/s16000/003.jpg.
I don't known much about girl size, but I chose the girl from the concert and put her a height of 150 cm (more or less the height of my cousin of 16 years old), that is equal to 10px; the tower (mid) width is 308px=46,2 m.
In the next pic, the mid tower width is 231px=46,2 m, and the complete tower width is 428px=85,6 m.
For the final pic, I can't set apart very well cuz... is a mess, but I think that the scale that I used is fairly close; the tower width is 20px=85,6 m, and the explosion diameter is 502px=2148 m, so the radious is 1074 m, using this calculator www.stardestroyer.net/Empire/Science/Nuke.html, I obtained 54 kilotons (Town level).
Now, several months later, since the last calculator use Airbust (mid-air explosion) and the explosion here is at ground level, going to use the formula from here, so formula is 80.3686*10^(-6)*R^3 = 99.5634 kilotons (Town level+)