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Locks imposed due to the corona virus pandemic have reduced seismic noise by up to 50 percent worldwide. Human activity causes high-frequency seismic waves from vibrations. But because of COVID-19 When orders are placed for staying at home, the reduction in seismic noise in 2020 is "the longest and most well-known anthropogenic reduction in seismic noise worldwide," scientists reported in Science magazine on Thursday.
The paper examined seismometers around the world and found that locks - which they claim included full quarantine, physical detachment, travel restrictions, and the closure of businesses and services - resulted in a significant reduction in seismic signals from human activity.
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"Measures to mitigate the COVID-19 pandemic have led to far-reaching changes in human activity, resulting in a month-long reduction in seismic noise of up to 50%," the paper said.
Seismic noise from human activity is constantly measured to warn of local geological hazards, the paper said. As a rule, there is less noise at night, on weekends and during the holidays in regions where Christmas and New Year are celebrated. Due to COVID-19, the scientists observed a global reduction in seismic noise that was quieter than Christmas and started in China in January and spread to Europe in March and to the rest of the world in April.
Continue reading: The best face masks to work outThe high-frequency seismic ambient noise (hiFSAN) in New York's Central Park was around 10 percent lower during the closure. In Belgium there was a 33 percent reduction in HiFSAN. And in holiday destinations like Barbados, which were affected by a decline in tourism, hiFSAN declined by 45 percent after the blockage in March and April - and was 50 percent lower in the same months than in previous years.
Overall, the paper states that the hiFSAN global median fell 50 percent between March and May 2020.