Earthquake make tsumani off coast? Or other direction?

super tall waves do not occur in open water from tsunami, those are called Rogue Waves and have nothing to do with quakes. a tsunami is a pressure step wave, the pressure step is caused by *vertical* movement of a quake. so strike slip faults off Washington coast are not the right kind to generate tsunami ordinarily. the pressure step moves at very fast velocity and can travel across oceans and sometimes be reflected back again. in deep water the step is barely noticable at the surface. it is only near land where the water gets shallow that the slowing of the pressure step causes it to rise upwards. the effect can be magnified even more if the shoreline has a funnel effect, like Crescent City California. yes the land near the quake epicenter can be struck by tsunami, research the Alaska Easter Sunday quake of 1964 to see what can happen.