这次地震最大烈度为9度到10度左右，逐渐减弱到5度。
Here, the highest intensity for this earthquake is about 9 to 10, and it goes down to 5.
地震基本烈度是指某地区今后一定时期内，在一般场地条件下可能遭受的最大烈度。
The basic seismic intensity of a region is defined as the maximum intensity to be suffered within a given interval of time in the future under the site condition of that region.
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.
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