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Vinony

megathrust

noun

  1. fold on the surface of a planet
L227600 on Wikidata ↗

Wiktionary

noun

Etymology: Etymology tree Proto-Indo-European *méǵh₂s Proto-Hellenic *mégas Ancient Greek μέγᾰς (mégăs)der. English mega- English thrust English megathrust From mega- + thrust.

  1. A sudden large-scale slip along a fault between a subducting and an overriding plate, resulting in a major earthquake.

    “On March 11, 2011, at 2:46 p.m., a magnitude-9 undersea megathrust earthquake struck off the northeastern coast of Japan.”