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Ground vibrations caused by traffic and industrial work halved globally during the coronavirus lockdown, a study shows. Social distancing, fewer cars on roads and drops in tourism and travel resulted in the longest and most pronounced quiet period of seismic noise in recorded history.  Seismic noise refers to vibrations in the ground, caused by traffic or heavy machinery and natural phenomena such as earthquakes and adverse weather.  Global human-caused (anthropogenic) seismic noise dropped by as much as 50 per cent since March as counties entered lockdown to halt the spread of SARS-CoV-2.  This made it even quieter than a normal pre-pandemic Christmas, which is traditionally the quietest time of the year for human-caused seismic activity. 

New yorkUnited statesGlasgow cityUnited kingdomSri lankaCity ofJohn clintonA kinemetrics episensorThomas lecocqImperial college londonUniversity of oxfordFrederick massin at swiss seismological serviceDr stephen hicks at imperial college londonSwiss seismological serviceTruro school in cornwallBlack forest