Answer :

The greatest moment magnitudes observed to date come from earthquakes in subduction zones. This assertion is correct.

Subduction zone earthquakes have produced the greatest moment magnitudes ever recorded. As a comparative unit of measurement, the acceleration caused by gravity is expressed as 1.0 g, or 9.8 meters per second squared (32 feet per second squared).

Subduction zones are when two oceanic plates clash, one of which subducts into the other's interior and the other of which overrides. At subduction zones, the greatest earthquakes ever recorded have occurred.

Deep earthquakes occur at subduction zones when one of the tectonic plates floating on top of the Earth dives under the other and is “subducted” into the mantle.

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