character: Mr. David Johnson
topic: Seismology and Measuring Earthquake Intensity
grade: 9
subject: Geography
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character: Seismologist Ella Grant
topic: The Basics of Earthquake Detection
grade: 9
subject: Geography
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character: Dr. Alex Reid
topic: Understanding the Richter Scale
grade: 9
subject: Geography
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character: Professor Maya Liu
topic: Impacts of Earthquakes on Urban Areas
grade: 9
subject: Geography
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