28.12.3 - Depth of Focus
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Practice Questions
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Define depth of focus.
💡 Hint: Think about how deep below the ground the earthquake occurs.
What depth categorizes a shallow-focus earthquake?
💡 Hint: Is it deeper or shallower than 70 km?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the depth of focus for shallow-focus earthquakes?
💡 Hint: Think about the general definition of shallow versus deep.
True or False: Deeper earthquakes cause more intense surface shaking than shallow ones.
💡 Hint: Consider the relationship between depth and intensity.
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Challenge Problems
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An earthquake occurs with a focus depth of 75 km. A nearby town experiences significant shaking, while another town 50 km away experiences mild effects. Discuss how depth of focus and distance influenced the observed intensity differences.
💡 Hint: Consider how the distance from the epicenter interacts with depth.
Evaluate the effects of a 65 km depth earthquake on two different soil types: soft and hard rock. Predict the intensity variances and the potential damage each soil type may face.
💡 Hint: Think about how deep quakes interact with different soil types.
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