they are coming together. several centimeters in fact, of movement a year is what we get. sometimes, you get along the fault, you get areas that don't move and accumulate pressure, the longer they dvorak the stronger the thrust is from the earthquake, we had this along this fault. because of that, the plates are converging, upward thrust, that displaces an incredible amount of to push in the form of it a wave. the initial wave, you get several waves, sometimes the most destructive wons come in the third or fourth wave coming in. it doesn't feel, if at all if you arie boat here, you don't feel it is a bump in the water. the wave becomes large, menacing