pb >>12777166
>Crust over for three days then BOOM!!!
Mini nova. The sun's pole shifts pulling all the planets poles to shift. Earth stops long enough to get blasted with the shell blown off the sun and then rotates the other direction as the oceans momentum flushes everything from the surface of the land. Continents sink, new ones pushed up and as the burned off atmosphere from one side of the planet is rapidly replaced by the expanding gas from the other side FLASH FROZEN under 5000 feet of ice. None of the people in the underground cities will survive.