megathrust en · 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.
Meanings
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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.
2021, Ruth Ozeki, The Book of Form and Emptiness, Canongate Books (2022), page 458:
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| megathrusts | Number=Plur | lexicographic |