noun
- a very small earthquake or earth tremor that is typically not felt by humans but can be detected by sensitive instruments
Usage: geological; technical
Examples
- The seismograph recorded several microseisms throughout the night.
- Microseisms are often caused by ocean waves hitting the coastline.
- Scientists use sensitive equipment to detect microseisms that humans cannot feel.
- The research station monitors microseisms to study tectonic activity.
- Wind and traffic can sometimes generate microseisms in urban areas.
- Microseisms provide valuable data about the Earth’s subsurface structure.