Over a six - month period they recorded the ambient seismic noise, the natural vibrations which usually are regarded as disturbing signals. (sciencedaily.com)
They are part of the background seismic noise in coastal areas. (sciencedaily.com)
The scientists developed an algorithm to distinguish rockfalls from other sources of seismic noise, like rainstorms, avalanches, and earthquakes. (sciencemag.org)