The containment of the population, necessary to stop the spread of the epidemic of coronavirus, has enabled the Earth to blow a little bit – in many jurisdictions, including in Paris, the pollution was dramatically reduced. The measure has also given rise to an environmental phenomenon surprising : the reduction of the seismic waves. According to a study conducted by an international team of researchers, published in the american journal Science, and relayed by our colleagues at The Express, the vibrations at the land are reduced by 50% to 80% in the world thanks to the containment of billions of individuals.
As emphasized by the researchers, the number of 76, this reduction takes into account that the seismic noise related to human activity. "What is meant by seismic noise are the amplitudes of vibration of the soil of human origin like transport (trains, cars, etc), construction activities or even mining," say they.
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to reach their findings, the scientists collected data from 300 monitoring stations established to measure the seismic activity. "Traditionally, seismometers measuring seismic waves from earthquakes or even to monitor the activity of volcanoes. But here, we have focused on a frequency band specific, that of the man-made noises, " says The Express, Corentin Caudron, volcano-seismologist at the institute of the Earth.
In Paris, a reduction of 30% to 50%
As stressed in the Paris, which echoes also the study, the seismic noise has obviously not decreased to the same scale according to the different regions of the world. Thomas Lecocq, seismologist at the royal Observatory of Belgium, and one of the researchers who took part in the study, indicates on a daily basis that Belgium has seen its vibration land related to the man are to be cut by 30 %. "In Paris, between -30 % and -50 %. In Nepal, the sensors are placed in the schools have made no noise during this period ", says he. If this phenomenon is extremely rare and is not perceptible by man, it will be in any case allowed scientists to improve their knowledge around our dear blue planet.
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