# megaquake

> English word · Noun

## Definitions
1. A megathrust earthquake.
2. A very powerful earthquake, generally rated above 7 on the Richter scale.

## Etymology
From mega- + quake.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/megaquake