Aftershocks of Aftershocks (What’s an Earthquake Like?)

Since the Great Tohoku Earthquake exactly one month ago, we have gone through an enormous amount of aftershocks. This website has a pretty neat interface for visualization. Unfortunately, the data stops on April 4, thus missing two of the largest aftershocks of magnitude more than 7 of last Thursday and today. Even so, it counts almost 900 individual aftershocks, more than 400 of which had a magnitude of higher than 5. These days, especially tonight, we are having what probably should be called aftershocks of aftershocks.

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