Which risk increases following a large subduction-zone earthquake in coastal regions?

💡 Explanation

When a large earthquake occurs at a subduction zone, coseismic vertical displacement of the seafloor occurs vigorously because of the plate slip during the earthquake, immediately generating a tsunami. Therefore, tsunami generation is increased rather than sinkholes, floods or wildfires each of which require specific triggering mechanisms.

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• Which soil consequence results when increased water runoff accelerates weathering?