Comment Comment by nkoren Here's another one, 1490 in China: https://en.wikipedia.org/wiki/1490_Ch%27ing-yang_eventAnd of course if the 2013 Chelyabinsk bolide had been just a bit larger, then the city would no longer exist. (Larger size = lower airburst, so even a modest increase in megatonnage can result in substantially more energy transferred to the ground).And there are other recent city-killer-size impacts that are well-known but fortunately didn't have cities underneath them, such as https://en.wikipedia.org/wiki/Campo_del_Cielo parent nkoren 5 years ago
And of course if the 2013 Chelyabinsk bolide had been just a bit larger, then the city would no longer exist. (Larger size = lower airburst, so even a modest increase in megatonnage can result in substantially more energy transferred to the ground).
And there are other recent city-killer-size impacts that are well-known but fortunately didn't have cities underneath them, such as https://en.wikipedia.org/wiki/Campo_del_Cielo