Home / News / Geophysical Events M 7.4 Miyako, Japan Location: ...°, ...° Depth: ... km General Technical Contributed AP News The Associated Press reports that there was at least one injury, and tsunami heights of 80 cm and 40 cm were recorded. Regional Tectonics (Video) Earthquakes in Japan result from the country being wedged among four major tectonic plates. This video covers the country’s complex tectonic setting and well-know earthquakes.