The continual movement of the Earth’s surface in normal times the product of the traffic of vehicles, the mass of the population, the functioning of the industries and other activities, has decreased almost 50% during the pandemic coronavirus.
And this has helped powerfully to an extremely valuable metric, the noise frequency seismic recorded the scientists.
“You can almost see like a wave,” said Stephen Hicks, a seismologist who worked on the study at Imperial College London in The Guardian. “You can see the seismic quiet that extends over time, starting in China at the end of January and then going on to Italy and beyond in march and April”.
The researchers analyzed traces of a network of 268 seismic sensors in 117 countries, and found the falls with substantial noise generated by humans in 185 of them. The biggest declines were observed in urban centres, busy as New York and Singapore, but even the remote stations in the Black Forest of Germany and in Rundu, Namibia, also fell substantially.
“The calm is unprecedented, at least as far as we can go back in time with seismic data, continuous,” said Thomas Lecocq, first author of the study in the Royal Observatory of Belgium.
The findings were published in Science, and reveal a side that will be easier to detect self-noise from the bottom of the Earth and thus to be able to find mini-earthquakes caused by the slipping incremental along geological faults. The same thing happens with the monitoring of volcanoes near urban centers.
Hicks added in the middle English, “andn cities with geological hazards, such as earthquakes, volcanoes and landslides, we want to monitor and perhaps receiving a warning of what is happening. But with the increase in the noise human, it will be increasingly difficult to see these small signals. We hope that this will generate a new set of studies in this new field of noise human.”
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