
monsterartist, DeviantArt
Okay, like with my remastered Calc on the Original Godzilla's Vapor Breath,this Calc is a remastered version of the Original Godzilla's Atomic Breath. Well, that is, the Godzilla vs. Megaguirus version of Godzilla, which is stated to be the Original Godzilla since in this timeline, the Oxygen Destroyer was not used, and the King of the Monsters didn't return until 1966. Fun Fact: Also in this timeline, Nuclear energy was banned because Godzilla was attracted to it, and Plasma was the replacement. And guess what? Big G simply adapted to consuming Plasma instead of Nuclear stuff! Ah, the science behind Kaiju movies never ceases to amaze me....
Anyways, I'm going to recalculate the energy it took Godzilla to boil that portion of the ocean we saw on the JSDF (or was it the G-Graspers?) monitors. Here's an image to illustrate what I mean:

Once again, this image is just here becauce I want you to see what's being measured.
Dimensions[]
Blue Region: 236.93687125km² = 236,936,871.25m² = 2,369,368,712,500cm²
Cyan Region: 1,524.589852km² = 1,524,589,852m² = 15,245,898,520,000cm²
Green Region: 1,442.389811km² = 1,442,389,811m² = 14,423,898,110,000cm²
Red Region: 338.577817km² = 338,577,817m² = 3,385,778,170,000cm²
Region Sum: 3,542.49435125km² = 3,542,494,351.25m² = 35,424,943,512,500cm²
Blue Region: 4.738737425km³ = 4,738,737,425m³ = 4,738,737,425,000,000cm³
Cyan Region: 30.49179704km³ = 30,491,797,040m³ = 30,491,797,040,000,000cm³
Green Region: 28.84779622km³ = 28,847,796,220m³ = 28,847,796,220,000,000cm³
Red Region: 6.77155634km³ = 6,771,556,340m³ = 6,771,556,340,000,000cm³
Region Sum: 70.849887025km³ = 70,849,887,025m³ = 70,849,887,025,000,000cm³
This assumes that multiplying the surface area by the 20-meter depth is okay.
Saltwater Density: 1.024 g/cm³ (Below Average Human) = 1.024 metric tons/m³ (Class 5) = 1,024,000,000 metric tons/km³ (Class T)
Blue Region: 4,852,467,123.2 metric tons
Cyan Region: 31,223,600,168.96 metric tons
Green Region: 29,540,143,329.28 metric tons
Red Region: 6,934,073,692.16 metric tons
Region Sum: 72,550,284,313.6 metric tons
Not that this matters a damn, but all the masses are (Class T).Energy Values[]
Blue Region: 1°C
Cyan Region: 7°C
Green Region: 11°C
Red Region: 23°C
Seawater Specific Heat Capacity: 3.85 kJ/kg/°C (9-C, Street Level)
Blue Region: 1.868199842432E+16 Joules, or 4.465104785927 (~4.5) Megatons of TNT (Low 7-B, Small City Level+)
Cyan Region: 8.41476024553472E+17 Joules, or 201.1175966906 (~201.1) Megatons of TNT (7-A, Mountain Level)
Green Region: 1.251025069995008E+18 Joules, or 299.0021677808 (~299) Megatons of TNT (7-A, Mountain Level)
Red Region: 6.14012225440768E+17 Joules, or 146.752443939 (~147) Megatons of TNT (7-A, Mountain Level)
Region Sum: 2.725195318413568E+18 Joules, or 651.3373131964 (~651.3) Megatons of TNT (7-A, Mountain Level+)
Blue Region: 5°C
Cyan Region: 11°C
Green Region: 15°C
Red Region: 27°C
Region Sum: 58°C
Blue Region: 78.810875218569 Gigawatts, or 18.83625124727 (~19) Tons of TNT (8-B, City Block Level)
Cyan Region: 552.307461319438 Gigawatts, or 132.004651367 (~132) Tons of TNT (8-A, Multi-City Block Level)
Green Region: 552.579012102756 Gigawatts, or 132.0695535618 (~132.1) Tons of TNT (8-A, Multi-City Block Level)
Red Region: 152.703550661901 Gigawatts, or 36.49702453678 (~36.5) Tons of TNT (8-B, City Block Level)
Region Sum: 2.367257210375804E+12 Watts, or 565.7880521931 (~566) Tons of TNT (8-A, Multi-City Block Level+)
Blue Region: 1.6207240191488E+18 Joules, or 387.3623372727 (~387.4) Megatons of TNT (7-A, Mountain Level)
Cyan Region: 1.042868245643264E+19 Joules, or 2.492514927446 (~2.5) Gigatons of TNT (High 7-A, Large Mountain Level)
Green Region: 9.86640787197952E+18 Joules, or 2.358128076477 (~2.4) Gigatons of TNT (High 7-A, Large Mountain Level)
Red Region: 2.31598061318144E+18 Joules, or 553.532651334 (~554) Megatons of TNT (7-A, Mountain Level+)
Region Sum: 2.42317949607424E+19 Joules, or 5.791537992529 (~6) Gigatons of TNT (6-C, Island Level)
Blue Region: 1.098940995297364224E+19 Joules, or 2.626532015529 (~3) Gigatons of TNT (High 7-A, Large Mountain Level)
Cyan Region: 7.071230586784489472E+19 Joules, or 16.90064671794 (~17) Gigatons of TNT (6-C, Island Level)
Green Region: 6.6899730976637392896E+19 Joules, or 15.98941944948 (~16) Gigatons of TNT (6-C, Island Level)
Red Region: 1.5703636214854797312E+19 Joules, or 3.75325913357 (~4) Gigatons of TNT (High 7-A, Large Mountain Level+)
Region Sum: 1.6430504242163050752E+20 Joules, or 39.26984761511 (~39.3) Gigatons of TNT (6-C, Island Level)
Blue Region: 1.2202248869375E+19 Joules, or 2.91640747356 (~3) Gigatons of TNT (High 7-A, Large Mountain Level+)
Cyan Region: 7.8516377378E+19 Joules, or 18.76586457409 (~19) Gigatons of TNT (6-C, Island Level)
Green Region: 7.42830752665E+19 Joules, or 17.75408108664 (~18) Gigatons of TNT (6-C, Island Level)
Red Region: 1.7436757575755E+19 Joules, or 4.167485080186 (~4.2) Gigatons of TNT (High 7-A, Large Mountain Level+)
Region Sum: 1.82438459089375E+20 Joules, or 43.603838214477772466539196940726577 (~44) Gigatons of TNT (6-C, Island Level)
Blue Region: 2.43496042044188E+20 Joules, or 58.19695077538 (~58.2) Gigatons of TNT (6-C, Island Level+)
Cyan Region: 1.5667953777908864E+21 Joules, or 374.473082646 (~374.5) Gigatons of TNT (High 6-C, Large Island Level)
Green Region: 1.4823197766158752E+21 Joules, or 354.2829294015 (~354.3) Gigatons of TNT (High 6-C, Large Island Level)
Red Region: 3.479507344235744E+20 Joules, or 83.16222142055 (~83.2) Gigatons of TNT (6-C, Island Level+)
Region Sum: 3.640561930874524E+21 Joules, or 870.115184243433078393881453154875717 (~870.1) Gigatons of TNT (High 6-C, Large Island Level+)
Blue Region: 4.23467792510275E+29 Joules, or 101.2112314795 (~101.2) Exatons of TNT (5-C, Moon Level)
Cyan Region: 2.72483845888552E+30 Joules, or 651.2520217222 (~651.3) Exatons of TNT (Low 5-B, Small Planet Level)
Green Region: 2.57792561360786E+30 Joules, or 616.1390089885 (~616.1) Exatons of TNT (Low 5-B, Small Planet Level)
Red Region: 6.0512658921142E+29 Joules, or 144.628725911 (~145) Exatons of TNT (5-C, Moon Level)
Region Sum: 6.331358454215075E+30 Joules, or 1.513230988101117351816 (~2) Zettatons of TNT (Low 5-B, Small Planet Level)