[69fc48]
Must have been a pretty short Pleadian video.
The biggest launcher available can put about 70 tons to low earth orbit, velocity is about 7.8km/s at a height of about 100km.
Assuming the whole thing was dropped in one big wallop with aerodynamic minimal losses,
Kinetic energy is about 0.5 * 7800m/s^2 * 70000kg = 2.13x10^12 Joules.
Potential energy is about 70000kg * 100000m * 9.8 = 6.86x10^10 Joules.
Approx Total: 2.2x10^12
2.2 terajoules is indeed a mighty wallop. But it's well short of the energy of a 5.9 earthquake (pic related).
The ZUMA launch was for the National Reconnaissance Office. It was a spy satellite, not a weapons platform.
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