ANSWERS: 1
  • It just has to survive or a piece of it does, the size of your fist. One fell last week in the USA through a house roof. Had the occupants of the house been under that fist sized remnant, they would have been killed. I'd call that serious damage. The size it was originally? All that depends on the composition of the meteorite and it's speed. Or are you talking about a global scale? It's hard to tell from the question. A meteorite starting out at 100 metric tonnes would not be slowed appreciably by earth's atmosphere. These have in the past, created fairly large craters. Generally, you get a crater that is equivalent to 10 times the objects original diameter.

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