Ground Micro-Vibrations, also known as Seismic Vibration or Floor Vibration, refers to a kind of vibration noise with a small amplitude caused by non-earthquakes on the earth's surface. These vibrations are usually generated by natural vibration sources (such as wind, waves, etc.) or artificial vibrations (such as machine vibration sources, vehicles, etc.), that are a stable non-repetitive random fluctuation on the ground. Seismic Vibration is characterized by being of low frequency and small amplitude, and its displacement is generally only a few microns to tens of microns, with a frequency variation range between 0.3-5.0 Hz.

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