Japan: Depth of quake caused widespread shaking

(From the Yomiuri Shimbun)

The main reason why the earthquake that occurred west of the Ogasawara Islands on Saturday night shook most parts of the country — in addition to the temblor’s strength — was that the quake’s focus was extremely deep, according to seismologists and the Japan Meteorological Agency.

The shaking was remarkably strong in the Kanto region. Seismologists attribute this to fact that the seismic waves reached the region after passing through undersea tectonic plates, which are harder than land plates and transmit waves more easily. Read more

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