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EXPLAIN IT TO ME

Measuring earthquakes on the Richter scale

Q: The recent Japanese earthquake was a magnitude 9.0. How is this measured and what does the number really mean?

QUESTION OF THE DAY

TODAY'S QUESTION: Is there too much attention paid to the royal wedding? (Poll closes Monday at 4 p.m.)

  • YES (3202 responses)

    78.0%

  • NO (901 responses)

    22.0%

4103 total responses

(Results not scientific)

This poll is closed to voting.