SOLUTION: How many times more powerful was the earthquake in Alaska (with a magnitude of 9.2 on the Richter scale) than the San Francisco earthquake, in 1906, with a magnitude of 7.9 on the

Question 1192135: How many times more powerful was the earthquake in Alaska (with a magnitude of 9.2 on the Richter scale) than the San Francisco earthquake, in 1906, with a magnitude of 7.9 on the Richter scale?
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
i believe the simplest explanation would be:
an earthquake with a magnitude of 9.2 on the richter scale is 10^(9.2 - 7.9) more powerful than an earthquake with a magnitude of 7.9 on the richter scale.
10^9.2 / 10^7.9 = 10^(9.2-7.9) = 10^1.3 = 19.95 times as powerful.

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