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Question: 130 the richter magnitude scale the richter magnitude scale is...

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1.30 The Richter magnitude scale. The Richter magnitude scale is commonly used to characterize earthquakes and their relative levels and it can be viewed as a particular form of the logarithmic scale. The Richter scale is defined as follows: Ao where A is the maximum excursion of the seismograph (ie., the amplitude of the seismograph) and Ao is a reference amplitude calculated based on the distance of the seismograph from the epicenter of the earthquake. Consider a magnitude 8.0 earthquake and a magnitude 9.4 earthquake. What is the ratio between the actual strengths of the two earthquakes in terms of amplitudes (often called shaking amplitude)? a. b. Energy released in an earthquake relates to the amplitude as A, where A is the amplitude. What is the ratio in energy released in the two earthquakes?

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