So at most, it would lead to earthquakes and tsunamis, not to mention gamma-ray bursts, it's not even as strong as a nuclear bomb blast. As long as you can promptly hide in shelters like three-defense facilities or emergency pods, the majority of people can survive.
What might actually cause large-scale human death is, rather, the collapse of the supply chain and severe shortages of essential supplies due to this drastic change of heaven and earth, compounded by the existing production relationships and wealth gaps, leading to inevitable unequal distribution of production materials... Just like the Cosmic Humans watching from the sky as you disaster victims starve to death.
