Megaquake Definition

noun

(seismology) A megathrust earthquake.

Wiktionary
A very powerful earthquake, generally with a Richter scale value exceeding 7.
Wiktionary

Other Word Forms of Megaquake

Noun

Singular:
megaquake
Plural:
megaquakes

Origin of Megaquake

  • mega- + quake

    From Wiktionary

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megaquake