Don’t imagine that there was a 1700’ tall wave.
The 130’ Japanese Tsunami wave was only a few feet.
They are called “tidal waves” because they come in like a tide that just won’t quit, not like a gigantic breaker.
And yes, “tidal wave” is a better name than Tsunami, which means “harbor wave,” although many scientists prior to Indonesia’s and Japan’s had denigrated the name “tidal wave” because they had never seen on camera why they were called that.
There’s quite a bit of difference between a landslide caused tsunami and a plate subduction tsunami. The first is material pushing the water out from a shoreline. The second involves the movement of the edge of two plates moving up or down from the bottom of a trench. A lot more energy is generated in the massive movement of the second.