Re: @ jmch
Tunguska is thought to have been an air burst. So anything of close magnitude would be air burst or very minor impact. On land, maybe equivalent to a small volcanic eruption. Deep ocean, probably not big enough to create tsunami on faraway shore. Worst case probably a shallow coastal hit that could create a small tsunami.
In any case for meteorites of the size mentioned, it would be local effects only.
Not to minimise potential damage of course, especially in densely populated areas, but no risk of global catastrophe
Biting the hand that feeds IT
