Out of curiosity, I looked up estimates of what I would guess might have been the largest tsunami in recent history--the one associated with the KT event 65 million years ago. And, yes, it created tsunamis much larger than we've ever seen.
To put it in perspective, it seems like a 10km asteroid would cause a 1.5km tsunami along the nearby coasts if it crashed in the middle of the (contemporary) Gulf of Mexico; a 200m tsunami if it crashed in the middle of the Indian Ocean; and a 100m tsunami if it crashed in the middle of the Pacific.[0]
Some coastal areas would experience this more than others because of geological formations, naturally, even holding distance from the impact site constant.
[0] I'm not sure how much this depends on angle of impact, speed of impact, and composition, if it does at all.
To put it in perspective, it seems like a 10km asteroid would cause a 1.5km tsunami along the nearby coasts if it crashed in the middle of the (contemporary) Gulf of Mexico; a 200m tsunami if it crashed in the middle of the Indian Ocean; and a 100m tsunami if it crashed in the middle of the Pacific.[0]
Some coastal areas would experience this more than others because of geological formations, naturally, even holding distance from the impact site constant.
[0] I'm not sure how much this depends on angle of impact, speed of impact, and composition, if it does at all.