1. The occurrence of very small earthquakes or seismic vibrations that are typically too weak to be felt by humans but can be detected and measured by sensitive instruments.
Usage: technical; geology/seismology

Examples

• Geologists monitor microseismicity near active fault lines to predict larger earthquakes.
• The drilling operation caused increased microseismicity in the surrounding rock formations.
• Sensitive seismometers can detect microseismicity that would be imperceptible to humans.
• Microseismicity is often studied to understand the stress distribution within the Earth's crust.
• The region showed elevated microseismicity following the major earthquake last month.