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Consider the following statements regarding the measurement of the magnitude of the earthquake.
1. The power of an earthquake is expressed in terms of a magnitude on a scale called Richter scale.
2. Richter scale is a linear scale.
3. An increase of 2 in magnitude means 1000 times more destructive energy.
Which of the statements given above is/are correct?
  • a)
    1 Only
  • b)
    1 and 3 Only
  • c)
    2 and 3 only
  • d)
    1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements regarding the measurement of the ma...
  • The power of an earthquake is expressed in terms of a magnitude on a scale called Richter scale. The Richter scale is not linear. It is logarithmic.
  • As it is logarithmic, each measurement from 1 to 10, marked on the Richter scale denotes a ten times amplitude and 32 times the energy on the seismograph. In fact, an increase of 2 in magnitude means 1000 times more destructive energy.
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Community Answer
Consider the following statements regarding the measurement of the ma...
Explanation:

1. The power of an earthquake is expressed in terms of a magnitude on a scale called Richter scale:
This statement is correct. The Richter scale is a logarithmic scale used to express the magnitude of an earthquake. It was developed by Charles F. Richter in 1935. The magnitude is determined based on the seismic waves recorded on seismographs.

2. Richter scale is a linear scale:
This statement is incorrect. The Richter scale is a logarithmic scale, not a linear scale. This means that each whole number increase on the Richter scale represents a tenfold increase in the amplitude of the seismic waves, not a linear increase.

3. An increase of 2 in magnitude means 1000 times more destructive energy:
This statement is correct. Since the Richter scale is logarithmic, each whole number increase corresponds to a tenfold increase in the amplitude of the seismic waves. Therefore, an increase of 2 in magnitude corresponds to 10 x 10 = 100 times more destructive energy.
Therefore, the correct statements are 1 and 3 only, making option 'B' the correct answer.
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