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| Godzilla vs Kong 2021 |
Among all versions of Godzilla across the multiverse of films, the Legendary MonsterVerse Godzilla stands as one of the most famous — and certainly one of the most overpowered. His feats of strength, resilience, and sheer destructive force cement his title as the true King of the Monsters.
But today we’re not here to analyze his battles against MUTOs, Ghidorah, or Kong as a whole. Instead, we’ll dive deep into his signature weapon: the Atomic Breath.
More than just a beam of radiation, this attack is the very essence of Godzilla’s nuclear might, a weapon that has evolved into one of the most devastating forces in cinema. And there’s no better example of its overwhelming power than the scene in Godzilla vs Kong where he literally blasts a hole straight through the Earth’s crust into the Hollow Earth.
So grab your Geiger counter, because we’re about to break down the science, the spectacle, and the sheer madness behind Godzilla’s most iconic move.
Can Godzilla’s Atomic Breath Really Drill to the Hollow Earth?
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| Godzilla vs. Kong intro 2021 |
According to the official stats shown in the intro of Godzilla vs. Kong, Legendary’s Godzilla possesses an Atomic Breath with a staggering temperature of 20,000 ºC and an energy output of 315 terajoules per second (3.15e14 J/s) — the equivalent of 75 kilotons of TNT every single second. That actually places him above the energy estimates made for Shin Godzilla’s beam.
But here’s the real question: could the official Atomic Breath actually penetrate 40 km into Earth’s crust, vaporizing rock with a density of 2,500 kg/m³ as shown in the film? Let’s run some physics to find out.
Step 1: Vaporized Material
We’ll assume Godzilla is blasting granite, with a density of 2,500 kg/m³, and that it takes about 10 MJ (megajoules) to vaporize 1 kg of it.
Step 2: Tunnel Dimensions
To estimate how much material must be removed:
- Tunnel diameter: 50 m (wide enough for a Kaiju like Kong to pass through).
- Depth to Hollow Earth: ~40 km (average thickness of Earth’s crust).
This gives us:
- Tunnel volume: ~78,539,816 m³
- Mass of granite: ~2 × 10¹¹ kg
Step 3: Energy Required
E = 2 × 10¹¹ kg × 10,000,000 J/kg ≈ 2 × 10¹⁸ joules
That’s roughly 478 megatons of TNT.
This is about 6,350 times more powerful than the official estimate of 75 kilotons per second. In other words, it would require approximately 105 minutes of continuous firing just to penetrate the crust.
Do not misunderstand — the official estimate is still incredibly powerful, capable of vaporizing 31,500,000 kg of rock per second — but it falls dramatically short of what the cinematic feat implies.
Recalculating the Dimensions
Before continuing, we need to establish a few assumptions to keep our estimate reasonable.
Using cinematic timing is problematic, as it often lacks internal consistency. A clear example is Kong, who traverses the tunnel in under three minutes. If we follow fan estimates placing the traveled distance at around 5,000 km, that would imply Kong is moving at roughly 250 times the speed of sound — something he has never demonstrated before or since.
For the tunnel’s size and length, I will instead assume:
- Diameter: 50 m
- Depth: 1,000 km
- Shape: cylindrical
- Rock density: 2,500 kg/m³
- Vaporization energy: 10,000,000 J/kg
With these parameters, we obtain:
- Volume ≈ 1.96 × 10⁹ m³
- Mass ≈ 4.9 × 10¹² kg
It is important to note that at a depth of 1,000 km, materials are not the same as at the surface. Temperatures can range from 600°C to 2,500°C, where rock exists in liquid form. Pressures can exceed 400,000 times surface pressure, and materials such as bridgmanite, ferropericlase, or davemaoite possess densities and properties very different from the granite assumed here.
However, these extreme conditions are not reflected in the film — neither when Kong is in the Hollow Earth nor when he ascends through the shaft created by Godzilla. For the sake of consistency and to simplify the estimate, I will maintain the 2,500 kg/m³ density.
Energy required:
E = 4.9 × 10¹² kg × 10,000,000 J/kg = 4.9 × 10¹⁹ joules
This equals approximately 11,711 megatons of TNT in total energy.This is comparable to the entire nuclear arsenal that existed during the Cold War — concentrated into a single beam.
If we use the 151 seconds of cinematic firing time, this results in a power output of:
3.24 × 10¹⁷ watts ≈ 77 megatons of TNT equivalent.
As mentioned earlier, relying on cinematic timing is difficult, since Godzilla does not demonstrate comparable feats again — at least until, arguably, the battle against Skar King and Shimo.
Conclusion
A physics-based estimate suggests that drilling a tunnel hundreds to a thousand kilometers deep through Earth’s crust would require energy on the order of 10¹⁹ joules — thousands of megatons of TNT. While the official Atomic Breath figures are undeniably devastating, they fall significantly short of the energy implied by the cinematic feat.
In other words, the Hollow Earth scene pushes Godzilla’s Atomic Breath far beyond its stated power levels, placing it firmly in the realm of extreme, near-planetary-scale energy output.
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