According tomedia reports, the blockade imposed because of the new coronavirus pandemic has reduced the global seismic noise by 50%. Seismic noise reduction in 2020 has become the longest and most significant global man-made seismic noise reduction on record, thanks to the home quarantine order for the new crown pneumonia, scientists report Thursday in the journal Science.
The new study, which analyzed seismic detectors from around the world, found that the blockade — including full isolation, physical isolation, travel restrictions, and the closure of businesses and services — led to a significant reduction in seismic signals caused by human activity.
“Measures to mitigate the new coronal pneumonia pandemic have led to widespread changes in human activity, which have reduced seismic noise by up to 50 per cent in a matter of months,” the study said.
The research paper points out that seismic noise generated by human activities is constantly being measured to help warn of geological hazards in the area. In general, there is less noise at night, on weekends and on holidays in areas celebrating Christmas and New Year. But now scientists have observed a global earthquake noise reduction even more than Christmas because of the effects of the new crown outbreak. Seismic noise reduction has been in China since January, spread to Europe in March and to other parts of the world in April.
During the blockade, the high-frequency seismic ambient noise (hiFSAN) in New York’s Central Park was reduced by about 10 percent. In Belgium, hiFSAN decreased by 33%. Holiday destinations such as Barbados, which have been affected by fewer tourists, saw a 45 per cent drop in The Blockade in March and April, down 50 per cent from a year earlier.
Overall, the global hiFSAN median fell by 50 percent between March and May 2020, the report said.