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1) Discuss with a partner how the displacement might be related to the Richter scale. Express that relationship in words or with an expression.

2) An earthquake shook the northwest part of Indonesia in 2004, causing massive damage and casualties. If a seismograph was located 100 km from the epicenter, it would have recorded a displacement of 125 m! Use your answer to the previous question to estimate the Richter rating for the earthquake.