How many magnitude 8 earthquakes does it take to equal the energy release for a magnitude 9 earthquake?

1 answer:

8 0

The popular Richter scale for measuring the magnitude of earthquakes is based on a log₁₀ scale.
Therefore, a magnitude 9 earth quake is 10 times a magnitude 8 earthquake.

That is, it takes ten magnitude 8 earthquakes to equal the energy released by one magnitude 9 earthquake.

Answer: 10

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