An increase of $1$ unit on the Richter scale corresponds to approximately $30$ times more energy released.…

An increase of $1$ unit on the Richter scale corresponds to approximately $30$ times more energy released. Approximately how many times more energy is released in an earthquake of magnitude $7$ compared to one of magnitude $5$?
  1. $60$ times
  2. $300$ times
  3. $900$ times
  4. $3000$ times

Solution

An increase of $2$ units ($5 \rightarrow 6 \rightarrow 7$) corresponds to $30 \times 30 = 900$ times more energy released.

Asked in: Homi Bhabha Practice

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