microearthquake

American  

[mahy-kroh-urth-kweyk] / ˌmaɪ kroʊˈɜrθˌkweɪk /

noun

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

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Etymology

Origin of microearthquake

First recorded in 1965–70; micro- + earthquake

Example Sentences

Another possible explanation emerged Thursday, when officials said that seismic monitors had noted a microearthquake — a magnitude of 1.5, and very rare for the region — just after midnight on Tuesday that may have been responsible for some of the sounds.

From New York Times