How was COVID-19 affected by seismic activity? Envirotech Online

One of the more positive side effects of quarantine measures restricting the prevalence of COVID-19 was reduced air pollution. However, a less widespread environmental impact of the virus appeared at the beginning of the month: seismic activity decreased. Seismograph stations across the UK have recorded a significant decrease in ground vibrations since Boris Johnson introduced closures on March 23.

While seismometers are usually used to measure earthquakes, they also capture background moisture caused by industry, transportation, and other human means. Scientists participating in the study revealed that this tinnitus is now half of what it was before the start of the quarantine, and that calm can provide an unprecedented opportunity to learn more about the internal workings of the Earth.

An unexpected rest period

The rumble caused by human activity – from pedestrians and special vehicles to trucks, trains and large industries – usually appears on a seismograph between 5 Hz and 15 Hz. However, a study by Imperial College London showed that these levels fell dramatically in the immediate aftermath of the closure.

By analyzing the data provided by 127 tools across the country, Dr. Stephen Hicks and his team found that current seismic activity is about half of what it was in mid-January. Data were collected from a mixture of British Geological Survey (BGS) science stations and a network of open-source scientific seismometers, each equipped with Raspberry-Pi microcomputers.

“You have to go back decades, to see noise levels like these,” said Dr. Hicks. “You often get quiet times in the evening or on weekends, but not continuously, for weeks.” Of course, decades ago, we didn’t have the same technology that we have today, which provides a golden opportunity to learn more about this planet.

An opportunity to study

A similar phenomenon has been observed throughout the world. The international community of seismologists, led by Dr. Thomas Lukoc of the Royal Belgian Observatory includes more than 85 participants in more than 30 countries around the world, each of whom shares the data collected in their region. The results were largely uniform: an unprecedented decrease in seismic activity.

While much of the media’s attention to the consequences of the coronavirus has focused on its economic implications, there is also an opportunity for the scientific community to use this calm to learn more about low-volume earthquakes and volcanic activity, both of which are often drowned out by human vibrations. Researchers in Sicily, for example, are trying to confirm more information about the inner workings of Mount Etna, Europe’s largest volcano.

However, some experts recommend caution. “theoretically, [the reduction in seismic noise] It can lead to new insights, as much of our understanding of the Earth’s internal structure comes from seismology, ”says Dr. Brian Bapti, head of the seismology department at BGS. “However, this generally relies on observations over long periods of time, while the time period in which our ability to detect may be improved is relatively short.”

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