The interval between major earthquakes might be 200 years.

大地震之间的间隔时间可能有200年。

《牛津词典》

So far, by this means, two major earthquakes have been predicted.

到现在为止，人们通过这个方法已成功预测了两次大地震。

youdao

The following are examples of observed unusual animal behavior before major earthquakes occurred.

下面要说的人们在大地震之前观察到的动物的异常行为。

youdao

This could explain why Taiwan has a large number of small earthquakes, but rarely a major one.

VOA: special.2009.07.07

Other major recorded earthquakes in the 17th,18th,and 19th centuries may have been produced by movement of the same fault that caused Tuesday's disaster.

VOA: standard.2010.01.13

The New York Daily News has a rundown of major earthquakes in the last century.

FORBES: Japan Hit by 8.9 Magnitude Earthquake, Tsunami

There have been major earthquakes, floods, power-grid failures, and Internet outages for decades.

FORBES: Why Rockefeller-Snowe's Regulations Won't Prepare The U.S. For Cyberwar

In 1978 the Japanese government passed a law requiring adequate warnings to be given of major earthquakes so that people could be evacuated and emergency services put on full alert.

ECONOMIST: Nature rarely repeats itself