UPSC Prelims 2006·GS1·geography·general geography

Consider the following statements: 1. Richter scale is logarithmic; 1 unit = 10x amplitude. 2. Each integer has 100x energy of previous. Which of the statements given above is/are correct?

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  1. A1 onlyCorrect
  2. B2 only
  3. CBoth 1 and 2
  4. DNeither 1 nor 2

Explanation

Statement 1 is correct because the Richter scale is a logarithmic scale. Each whole number increase on the scale represents a tenfold increase in the measured amplitude of the seismic waves. Statement 2 is incorrect because each integer increase on the Richter scale corresponds to approximately 32 times more energy release, not 100 times. Specifically, a two unit increase on the scale represents a 1000 times increase in energy. Therefore, only the first statement is true, making A the correct option.
geography: Consider the following statements: 1. Richter scale is logarithmic; 1 unit = 10x amplitude. 2. Each integer has 100x ene

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