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UPSC 2006: Consider the following statements : 1. The Richter scale is a logarithmic scale and so an increase of 1 magnitude unit represents a factor of 10 times in amplitude. 2. Each integer reading of the Richter scale has an energy 100 times that of the previous integer reading. Which of the statements given above is/are correct?
(a)1 only
(b)2 only
(c)Both 1 and 2
(d)Neither 1 nor 2
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Not attemptedCorrect Answer: (a) 1 only
The Richter magnitude scale is logarithmic, so a rise of 1 unit corresponds to a ten-fold (10×) increase in the recorded wave amplitude, making statement 1 correct. However, each whole-number step represents ≈31-32 times more energy release—not 100 times—so statement 2 is incorrect. ([usgs.gov](https://www.usgs.gov/index.php/media/images/richterscalegif?utm_source=openai))
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What is the correct answer to this UPSC 2006 Geography question?▼
The correct answer is option (a): 1 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physical Geography & Geomorphology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2006, GS Paper 1, as Question 87. It falls under Geography > Physical Geography & Geomorphology.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Physical Geography & Geomorphology?▼
UPSC has asked 25 questions from Physical Geography & Geomorphology (under Geography) across multiple years. Visit the topic page to see the full list and year-wise trends.