Human noise on Earth halved during pandemic lockdown

Scientists say the sound human beings made vibrating across the Earth halved during the global lockdown caused by the new coronavirus pandemic. Researchers say they tracked what they describe as a 'wave of quietening' between March and May this year. Seismologists who measure the shaking of Earth's surface the drop in this kind of human-caused noise was unprecedented. Researchers examined data from a global network of 268 seismic stations in 117 countries.