In fact, the February 27 quake occurred about 230 kilometers (140 miles) north of the strongest earthquake ever measured: a magnitude 9.5 event that occurred in 1960.

在过去的记录中，2月27日这次大地震发生地以北230公里（140英里）处发生过迄今最大的地震——1960年的9.5级地震。

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To get an accurate sample of an event that takes, for example, 20 seconds, samples must be measured every 10 seconds according to the Nyquist theorem.

例如，根据奈奎斯原理，为了得到发生时间为20秒的事件的准确样本，那么必须每10秒进行一次抽样。

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In any event, the measured frequency response function will be affected by the window and leakage that does result.

无论如何，测得的频响函数必将受到窗函数和泄漏的影响。

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Certaintly, output can be measured after the event.

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