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In the Gutenberg-Richter relation, the b-value is typically close to

  • A.0.1
  • B.5.0
  • C.10.0
  • D.1.0

Answer: D

Correct answer: 1.0

The Gutenberg-Richter relation states that the logarithm of the number of earthquakes above a given magnitude falls linearly with magnitude, and the slope \( b \) is close to 1 in most regions. A \( b \) of one means that for every earthquake of magnitude 6 there are about ten of magnitude 5 and a hundred of magnitude 4, which is why the smallest events overwhelmingly outnumber the rest.

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