character: Dr. Sam Rockwell
topic: Geology Experts and Types of Seismic Waves
grade: 9
subject: Geography
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character: Professor Linda Earthson
topic: Understanding Primary and Secondary Waves
grade: 9
subject: Geography
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character: Dr. Mike Tremor
topic: The Role of Surface Waves in Earthquakes
grade: 9
subject: Geography
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character: Geologist Emily Stone
topic: Seismic Wave Detection Techniques
grade: 9
subject: Geography
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