由于他是在中西部发表演讲，他决定先说明美国历史上最严重的地震不是发生在加利福尼亚或阿拉斯加，而是1811年在密苏里州的新马德里。
Since he was speaking in the Midwest, he decided to begin by noting that the most severe earthquake in American history took place not in California or Alaska but at New Madrid, Missouri in 1811.
这些震动也与新马德里断层线无关。
They have occurred in areas not associated to the New Madrid fault line.
随着数据的收集，很明显，沿新马德里断层没有出现此类动向。
As the data was collected, it became evident that such motion was not occurring along the New Madrid fault.
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