Question 190747: One of the strongest recorded earthquakes to date was in Colombia in 1906 with a Richter scale reading of 9.5. On March 2, 1933, an earthquake with a magnitude 8.9 on the Richter scale struck Japan. How many times more intense was the Colombia earthquake than the Japan earthquake?
Round-off your answer to the nearest unit.
Every time I tried doing this question I came up ith a decimal which I rounded up to 1. It just seems wrong.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! One of the strongest recorded earthquakes to date was in Colombia in 1906 with a Richter scale reading of 9.5. On March 2, 1933, an earthquake with a magnitude 8.9 on the Richter scale struck Japan. How many times more intense was the Colombia earthquake than the Japan earthquake?
Round-off your answer to the nearest unit.
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dB = 10log[P/Po]
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If M = 9.5:
Power = 10^9.5 = 3,162,277,660Po
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If M = 8.9
Power = 10^8.9 = 794,328,234.7 Po
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10^9.5 / 10^8.9 = 3.98107
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The stronger is almost 4 times stronger than the weaker.
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Cheers,
Stan H.
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