Earthquakes produce two types of seismic waves.

地震产生两种地震波。

The latest seismic activity was also felt in northern Kenya.

肯尼亚北部也感觉到了最近的地震活动。

I have never seen such a seismic shift in public opinion in such a short period of time.

我从未见过公众舆论在如此短的时间内发生如此巨大的转变。