Are you talking waves or quasi-static deformation? Quasi-static waves have no intrinsic attenuation, but very strong, r to the third or fourth power, geometrical attenuation, and would be vanishingly smaller in your neighborhood than in Japan.

If you're talking about thermoelastic dynamic waves with periods of days to weeks, I have no idea what you're talking about.

And tides ARE too small to trigger earthquakes MUCH, more than a very tiny fraction of the time. Check out my Science paper with Cochran, and in addition, I compared the entire Harvard catalog of earthquakes with a more sophisticated tidal calculation than is generally available, which I didn't publish because everyone knows already that tidal influence is tiny.