Better seismometry, Quiet Earth, Thanks Coronavirus

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Measures implemented to control the spread of COVID-19 in Brussels have led to a significant reduction in human-induced seismic noise, decreasing by approximately one-third according to data from a local seismometer. This reduction has enhanced the sensitivity of the surface seismometer, allowing it to detect small quakes and quarry blasts nearly as effectively as a deeper borehole detector. The discussion also highlights the contrast between daytime and nighttime noise levels, with nighttime being notably quieter. Additionally, it is noted that man-made noise primarily affects short-period sensors, while long-period sensors remain largely unaffected.
Tom.G
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https://www.nature.com/articles/d41...=social&utm_campaign=naturenews&sf232171849=1

Data from a seismometer at the observatory show that measures to curb the spread of COVID-19 in Brussels caused human-induced seismic noise to fall by about one-third...
The facility’s surface seismometer is now almost as sensitive to small quakes and quarry blasts as a counterpart detector buried in a 100-metre borehole...

Cheers,
Tom
 
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Tom.G said:
https://www.nature.com/articles/d41...=social&utm_campaign=naturenews&sf232171849=1

Cheers,
Tom
I still have a large building site across the road from home that hasn't quietened down too much

it's easy to see the difference between daytime … noisy and the nights ... relatively quiet

E_W short period sensor...

Clipboard01.jpg
Man-made noise doesn't really affect the long period seismo

That's the Mw6.5 from Idaho, USA

20200331 M6.5 Idaho USA zhism.jpg
Dave
 
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