microearthquake
/ˌmaɪkroʊˈɜrθˌkweɪk/
noun
- A very small earthquake, usually too weak to be felt by people but detectable by sensitive instruments.
- Microearthquakes happen frequently in volcanic regions.
- No one felt the microearthquake, but the equipment picked it up clearly.
- Seismographs recorded a microearthquake near the fault line last night.
Synonyms