Two thousand nuclear bombs exploding simultaneously wasn't a big deal for the entire Blue Star.
Huaxia's chosen nuclear bombs were on average around one million tons in yield. Combined, the two thousand bombs totalled two billion tons.
If you compare it to the energy released by the Earth's crust during an earthquake, an 8.0 magnitude quake has a yield of approximately 1.1 billion tons, while an 8.5 magnitude quake is around 6.2 billion tons.
In other words, over two thousand nuclear explosions were equivalent to humans actively triggering a magnitude 8.1 earthquake on the surface of Blue Star.
Over countless eons, Blue Star had experienced 9.0 (with a yield of 35 billion tons) and even 9.5 magnitude earthquakes. A magnitude 8.1 quake was merely a scratch, a minor issue.
However, for mankind, it was a tremendous disaster, especially for Goryeo and Japan, their proximity to the epicentre was alarming.
These two countries were too close to the source of the tremors!