Which mechanism during a large subduction zone earthquake causes rapid coastal land subsidence?

💡 Explanation

During a subduction zone earthquake, elastic rebound occurs because the overriding plate, previously deformed by friction, snaps back to its original shape, causing a sudden downward movement of the coastline. Therefore elastic rebound results in subsidence, rather than isostatic adjustment, tectonic creep, or liquefaction, which have slower or localized effects.

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