noun
- a seismic tremor or vibration that occurs on the moon’s surface
Usage: astronomy; geology
Examples
- Scientists detected a moonquake using seismometers left by Apollo astronauts.
- The moonquake registered on instruments for several minutes.
- Moonquakes are much weaker than earthquakes but can last longer.
- Researchers study moonquakes to understand the moon’s internal structure.
- The Apollo missions recorded thousands of moonquakes over several years.
- Unlike earthquakes, moonquakes occur deep within the moon’s interior.