Does it say where the Giant Asteroid hits the surface of the Earth? Does it say how big, specifically in miles or kilometers, the Giant Asteroid is? Does it give information about the composition (nickel/iron, stone, frozen gases, etc.) of the Giant Asteroid, its angle of intersection with the Earth and/or its velocity at intersection with the Earth?
Knowing the size, composition, intersection angle and velocity one can simulate the impact on one of several meteor impact calculators online. Placement of the impact has a effect also. An impact in the western Pacific ocean will affect those countries with a tsunami whereas a strike in central Africa will create a different ejecta with different effects on the world.
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