The real tsunami machine of a subduction zone is found where the movement is concentrated near the surface when the ocean plate moves down and the land side “bounces” back. If I recall the upper side of the fault in the Boxing Day Tsunami moved some 8 meters when the tension which had been holding it up. So shallow quakes generally affect us more.
Weird .. most of the time in San Diego, we get shallow quakes .. and they don’t give much action, and it’s over in a few seconds.
However, we did have a 7.1 a few years ago, and it was really rockin’ and rollin’ .. in fact it was to the point that I ran out of my apt .. because I wasn’t sure if my building was going to slide down the hill or not.
Naturally, I forgot to grab my wallet and keys to my car .. so running out of the house might not have been a good idea. LOL
Anyway, I wish I could remember how deep that one was .. it was centered about 100 miles east of me but I don’t know what the depth was.
Thanks for all the great info Jim.