Could take weeks to repair all the damage. For more info look up "Solar storm" on the internet.
Last time it happened was in 1859 when all we had was telegraph.
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An asteroid hit. A near miss by something smaller than the earth occurred about ten thousand years ago. It heaved up the earths crust into mountain chains. Notice they are in the form of a great circle. The Rockies-- Andes. And the Pyrenees--Alps--- Himalaya's.
It left the mammoths frozen in ice for the last ten thousand years now. This happened when mankind was on Earth. Proof? The cave drawings in France show men aiming spears at standing mammoths.
It turned the Land of milk and Honey into a desert wasteland. Destroyed the civilization that built the unbuildable Pyramids.
It may happen about every ten thousand years. The Earth has been destroyed several times every ten thousand years. By fire, ice, asteroids, Passing through a mass of astral debris-- on collision courses-- one or the other.
The worst we have seen was the Indian Ocean tsunami following the earthquake on the day after Christmas. Killed quarter of a million people in over a dozen countries.
A ten mile or larger asteroid impact. Last time that happened 40% of all species were left extinct
China had an earthquake in the '70s that killed 500,000 people, but it was kept quiet at the time.
China was a bit different then.
But I'd go with the Boxing Day tsunami.
in space there are hundreds of things threatening our planet that can destroy all living things, but as natural disaster i think earthquakes are the worst no sirens or meteorologist to alert the population on time.
Another republican president.
I watched a film the other night about a certain natural disaster. And it really got me wondering about what could be the worst kind on a death and destruction scale? I think I know what one it is. But I'm curious as to what others think. And when I was thinking of this, I was thinking of it on a time-line, as to how frequently certain natural disasters happen on average. My answer which I will not reveal as of now (since it could skew answers) , I'm certain could only be topped on a death and disaster scale by one other disaster that to the best of my knowledge, humanity has not experienced, and hopefully never will.