Which phenomenon causes increased shaking intensity when seismic waves encounter sedimentary basins?

💡 Explanation

When seismic waves enter a sedimentary basin, constructive interference and wave trapping occur because the soft sediments slow the seismic waves and reflect them, causing energy to amplify and prolong shaking duration. Therefore greater shaking results, rather than increased velocity, refraction, or damping which require different mechanisms and material properties.

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