There are seismic recording stations throughout the world, and like most sciences, the monitoring of the effects of the COVID 19 Pandemic on the world was a running live commentary for all with a scientific interest.
This Pandemic has been unique in this area, as science was interacting with the Virus daily, and learning from the experiences like no other Pandemic has allowed to happen.
Seismology is no different and it has made the data collected put to use, to see how the changes being witnessed in the readings of Seismic Noise were resulting from the changes made from Human Activities.
Seismic Noise is a unwanted recorded information, in that it is not from seismic activity, but environmental activity.
The impact of the Weather Systems on Land and in the Oceans remained consistent and maintained producing a Microseism with the average reading of 1Hz recorded for the Seismic Noise.
Human Activity can produce 1Hz - 40hz and the average levels of Anthropogenic Noise produced during the lock down was 4Hz, the data shows as the Human Activities were reduced over the period of time and larger proportions of the populations were put into lockdown the Anthropogenic Noise dropped along with the reduced activities.
The above although recorded on a seismic recording device are tremors and not seismic activity.
Seismic Activity is from Earthquakes and Tectonic Plate Activity, as well as magma moving within the earths crust.
Seismic Activity that is being recorded with levels detectable above Higher Anthropogenic Seismic Noise levels, when present local to an environment with a TT in use, will most likely cause a Needle to skip a groove or two as the minimum, but this does depend on the bedrock in the area as well, as the make up of this can reduce the impact felt on the surface from the transferred energies.
What ever way it is thought about, the golden times of listening to a music replay on a TT, with the least seismic noise creating a welcome impact, came to an end, when the Lockdowns were lifted.
I hope all our forums Vinyl Loving Friends got a few extra hours with their set ups when free time was plentiful.