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Measuring and Comparing Earthquakes

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What is the formula for measuring earthquakes?

Why is a 7.0 earthquake ten times stronger than a 6.0 earthquake?

Pick an earthquake in your region of the world.

Give the measurement of the earthquake.

Explain what this measurement means.

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Solution Preview

The magnitude (Richter Magnitude) of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs. Adjustments are included for the variation in the distance between the various seismographs and the epicentre of the earthquakes. On the Richter Scale, magnitude is expressed in whole numbers and decimal fractions.

The equation for Richter Magnitude is:

ML = logA(mm) + (Distance correction factor)

Here log has logarithmic ...

Solution Summary

The formula for measuring earthquakes is explained, going into detail on result comparison and the meaning of measurements.