The blast registered a 5.0 reading  on the Richter magnitude scale, even though it was not an earthquake. Imagine  the catastrophic effects of such an impact crater anywhere near a metropolitan  city. Or better yet, let’s not.

尽管这不是地震， 但爆炸的里氏震级读数为 5.0。想象一下大都市附近任何地方的这样一个撞击坑的灾难性影响。 或者更好的是， 我们不要。