Question:

Which of the following factors does not affect strong ground motion?

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Ground motion is purely a geophysical phenomenon; building type affects damage, not the motion itself.
Updated On: Sep 24, 2025
  • Wave types
  • Site conditions
  • Distance from epicenter
  • Type of structure
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The Correct Option is D

Solution and Explanation


Step 1: Understanding ground motion.
Ground motion depends on properties of seismic waves, site geology, and distance from the source (epicenter).

Step 2: Check each factor.
- Wave types: Different seismic waves (P, S, surface) cause different levels of ground shaking.
- Site conditions: Local soil and rock conditions greatly amplify or reduce shaking.
- Distance from epicenter: Closer sites experience stronger motion.
- Type of structure: This affects how a structure responds to motion, but does not affect the ground motion itself.

Step 3: Conclusion.
The type of structure does not influence the ground motion itself.

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