震源有20英里深、强度7.0级。
The earthquake was more than 20 miles deep and had a magnitude of 7.0, the USGS said.
结合模拟记录，探讨了瑞雷面波的形成条件，同时讨论了震源埋深对面波能量的影响。
According to the synthetic records, the condition of Rayleigh surface wave excitation is investigated, and the influence of the depth of epicenter on the energy of surface wave is discussed also.
在隐没带，当更老的和更冷的海洋地壳下降到另一个构造板块下面时，深震源地震可能会发生在非常深的深度(达到700公里)。
In subduction zones, where older and colder oceanic crust descends beneath another tectonic plate, Deep focus earthquakes may occur at much greater depths (up to seven hundred kilometers).
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