>(The physics aren't the same, but just for the sake of comparison: Chicxulub's 4e8 megatons-TNT of energy, at 300 km, is 1/r^2 equivalent to a 4 megaton nuke,

>(The physics aren't the same, but just for the sake of comparison: Chicxulub's 4e8 megatons-TNT of energy, at 300 km, is 1/r^2 equivalent to a 4 megaton nuke, at 30 meters). Altitude 300mi is not the same as linear distance to blast 300mi At 300mi up you could be over a different continent and get a good view and you would probably want to be so that you get a better view from the side.