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How does a seismograph work? What is the Richter scale?

How does a seismograph work? What is the Richter scale?

How does a seismograph work? What is the Richter scale? These questions, and many more, are answered by this page, published by HowSuffWorks, Inc. The pages not only examines these issues, but it also provides images and videos to help users better understand the topic.

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