Welcome to my new calculation, we all know that the CSRC is made on many assumptions, besides the fact that OPM's planet is considerably different from ours (noting mainly the two supercontinents), that's why here in this calculation I'm going to calculate the thickness of the earth's crust in manga.
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Very Good, The radius of the planet is 6.374km or 6.374.000m
6.374 = 288px
The thickness of the earth's crust is: 9px = 199,1875km or 199.187,5m
The surface area is: 510.100.000km^2
volume = 510.100.000*199,1875 = 101.605.543.750km^3
The density of the earth's crust is 2700kg/m^3
Mass = 2700*101.605.543.750.000.000.000 = 2,74335e23kg
But there are a few drops every hundred kilometers, so I'm going to multiply the mass by 0,8
2,74335e23*0,8 = 2,2e23kg
I will assume the attack is melting the crust (As in current accepted calculation)
The specific heat capacity of granite is: 821,46
The Melting temperature of granite is 1215 degrees celcius and considering that the initial temperature is 20 degrees celcius...
E = 2,2e23*821,46*1195 = 2,16e29j or 51,62 Exatons
Latent heat is: 947657,98
EF = 2,2e23*947657,98 or 2,085e29j or 49,83 Exatons
51,62+49,83 = 101,45 Exatons (5-C)