Calc done by iwandesu.
http://i1.mangapanda.com/katekyo-hitman-reborn/228/katekyo-hitman-reborn-472199.jpg
http://i3.mangapanda.com/katekyo-hitman-reborn/228/katekyo-hitman-reborn-472200.jpg
http://i5.mangapanda.com/katekyo-hitman-reborn/228/katekyo-hitman-reborn-472198.jpg
Zakuro fucks all over his hometown because he is byakuran bitch let's see how good this is
http://i.imgur.com/8mY4V7a.jpg
those spike pine trees are around 15-24 meters (20px)
eruption on the mountains height=687px (515.25-824.4 meters)
eruption mountain width 111px (83.25-133.2 m)
eruption of earth height=242px (181.5-290.4m)
eruption of earth width=15px (11.25-18m)
now we have 2 cylinders
for the low end the larger has 2804635.108052 and the smaller has 18041.4548424806
for the high end the smaller has 73897.7990348 m^3 and the larger has 11487785.402582977 m^3
now we add both and multiply by 3 because there are 3 of each in panel
Volume of molten earth (LE)=(2804635.11+18041.45) x 3
Volume of molten earth (HE)=(73897.8+11487785.4025) x 3
Volume(LE)= 8468029.68868m^3
Volume HE=34685049.6049 m^3
it is worthy nothing that those aren't volcanos but mountains which means he also molten the same volume of earth as the one of lava
melting value of rock is 4350 MJ/m^3
E= V x MR
E(LE)=8468029688680 x 4350
E(LE)=3.6835929e+16
E(HE)=34685049604900 x 4350
E(HE)=1.5087997e+17 joules
Zakuro destroys his hometown=8.8-36 megatons of tnt