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That is a question with a great many variables! Let's narrow it down. Let's say a 1 mile wide asteroid made of solid rock is going to impact Lake Michigan 50 miles out to lake at 12 miles per second. You are observing this event from the City of Chicago. It impacts the lake in about 800 feet of water.

In that first instant, there is a flash of light 300 times brighter and hotter than the sun and it appears to be 60 times the size of the sun. There is a good chance this alone will kill you as it will continue to radiate this amount of energy for about 4.5 minutes. But lets say it doesn't, your a super hero.

10-15 seconds after impact the region is struck by a 8.0-8.5 earthquake on the Richter scale that lasts a few minutes. This will certainly begin to crumble the city and general area to the ground.

2 minutes after first light, fragments of molten earth and red hot debris ranging in size from small cars to pebbles begins to rain down all over the place, up to several hundred miles from the impact site and this may last a while.

4 minutes after first light a 1,000 mph hour blast wave arrives sweeping away much of the landscape, strangely enough FOLLOWED by a 120 decibel explosion a minute or so after...most likely blowing out you ear drums, if of course you aren't already a charred, crushed, pulverized smattering of dust already.

Last, but not least, 26 minutes or so after first light, a 200 feet high tsunami comes crashing ashore at 100 mph washing the rest of the landscape away and washing 100-150 miles inland on all sides of the lake, depending on the local topography.

That is one scenario, but these events only occur every few million years and the chance of one happening over the Great Lakes restricts it to an even more infinitesimal chance. SO I wouldn't lose sleep over it. :-)

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11y ago
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15y ago

the ice would go boom kaboom

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12y ago

It know it depends if i care or not

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Q: What would happen if an asteroid hit the great lakes?
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