An earthquake measuring 6.1 on the Richter Scale struck California yesterday.

昨天加利福尼亚发生了里氏6.1级地震。

《柯林斯英汉双解大词典》

At 21:53 UTC yesterday, an earthquake of magnitude 7.0 struck the Caribbean nation of Haiti.

昨日世界标准时间21点53分，加勒比海附近的海地发生里氏7.0级地震。

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This time yesterday, we were having an English lesson. There was a slight earthquake.

昨天在这个时候，我们正在上英语课，这里发生了轻微地震。

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