I grew up fearing atomic bombs during the cold war.
lol. I remember those days.. don't eat the yellow snow, it may be radioactive ,, uurrr, no wait a minute, that was something else.
Scared the crap out of everyone.
Fun days.........
Oh, this one wouldn't end life on earth or anything; wouldn't want to be within a hundred miles or so of the impact though......
Unsure of the tsunami size if it hit an ocean; 1,600 megatons is a lot less energy than the Chilean Earthquake of 1960 (largest quake known) at 11,000 megatons.