在今天早上袭击日本的8.9级的地震是强度最大的板块叠加的结果：几个专家称他们可以推断出在日本最近的一次相似烈度的地震发生在公元869年。
The shock of the magnitude-8.9 earthquake that hit Japan this morning was its sheer intensity: Several experts have hypothesized that the last one of this magnitude struck Japan in 869 C. E.
在今天早上袭击日本的8.9级的地震是强度最大的板块叠加的结果：几个专家称他们可以推断出在日本最近的一次相似烈度的地震发生在公元869年。
The shock of the magnitude-8.9 earthquake that hit Japan this morning was its sheer intensity: Several experts have hypothesized that the last one of this magnitude struck Japan in 869 c.e..
但是，由于强度高达IX度(M.M。烈度)，又是在人口稠密的地区发生的，这次地震就具有重大的工程意义。
However, the Modified Mercalli Intensity reached IX, and the occurrence of the earthquake in a highly populated area makes it of engineering significance.
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