microearthquake

[mahy-kroh-urth-kweyk]

noun

an earthquake of very low intensity (magnitude of 2 or less on the Richter scale).

Origin of microearthquake

First recorded in 1965–70; micro- + earthquake
Also called microtremor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019