Effect of coronavirus lockdowns on the ambient seismic noise levels in Gujarat, northwest India

Abstract The Covid-19 pandemic created havoc and forced lockdowns in almost all the countries worldwide, to inhibit social spreading. In India as well, as a precautionary measure, complete and partial lockdowns were announced in phases during March 25 to May 31, 2020. The restricted human activities...

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Auteurs principaux:	Ketan Singha Roy, Jyoti Sharma, Santosh Kumar, M. Ravi Kumar
Format:	article
Langue:	EN
Publié:	Nature Portfolio 2021
Sujets:	Medicine R Science Q
Accès en ligne:	https://doaj.org/article/67568c671a1a46bf910a84107befa55e
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spelling	oai:doaj.org-article:67568c671a1a46bf910a84107befa55e2021-12-02T13:27:08ZEffect of coronavirus lockdowns on the ambient seismic noise levels in Gujarat, northwest India10.1038/s41598-021-86557-92045-2322https://doaj.org/article/67568c671a1a46bf910a84107befa55e2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86557-9https://doaj.org/toc/2045-2322Abstract The Covid-19 pandemic created havoc and forced lockdowns in almost all the countries worldwide, to inhibit social spreading. In India as well, as a precautionary measure, complete and partial lockdowns were announced in phases during March 25 to May 31, 2020. The restricted human activities led to a drastic reduction in seismic background noise in the high frequency range of 1–20 Hz, representative of cultural noise. In this study, we analyse the effect of anthropogenic activity on the Earth vibrations, utilizing ambient noise recorded at twelve broadband seismographs installed in different environmental and geological conditions in Gujarat. We find that the lockdowns caused 1–19 dB decrease in seismic noise levels. The impact of restricted anthropogenic activities is predominantly visible during the daytime in urban areas, in the vicinity of industries and/or highways. A 27–79% reduction in seismic noise ground displacement (drms) is observed in daytime during the lockdown, in populated areas. However, data from station MOR reveals a drastic decrease in drms amplitude both during the day (79%) and night times (87%) since factories in this area operate round the clock. The noise at stations located in remote areas and that due to microseisms, shows negligible variation.Ketan Singha RoyJyoti SharmaSantosh KumarM. Ravi KumarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ketan Singha Roy Jyoti Sharma Santosh Kumar M. Ravi Kumar Effect of coronavirus lockdowns on the ambient seismic noise levels in Gujarat, northwest India
description	Abstract The Covid-19 pandemic created havoc and forced lockdowns in almost all the countries worldwide, to inhibit social spreading. In India as well, as a precautionary measure, complete and partial lockdowns were announced in phases during March 25 to May 31, 2020. The restricted human activities led to a drastic reduction in seismic background noise in the high frequency range of 1–20 Hz, representative of cultural noise. In this study, we analyse the effect of anthropogenic activity on the Earth vibrations, utilizing ambient noise recorded at twelve broadband seismographs installed in different environmental and geological conditions in Gujarat. We find that the lockdowns caused 1–19 dB decrease in seismic noise levels. The impact of restricted anthropogenic activities is predominantly visible during the daytime in urban areas, in the vicinity of industries and/or highways. A 27–79% reduction in seismic noise ground displacement (drms) is observed in daytime during the lockdown, in populated areas. However, data from station MOR reveals a drastic decrease in drms amplitude both during the day (79%) and night times (87%) since factories in this area operate round the clock. The noise at stations located in remote areas and that due to microseisms, shows negligible variation.
format	article
author	Ketan Singha Roy Jyoti Sharma Santosh Kumar M. Ravi Kumar
author_facet	Ketan Singha Roy Jyoti Sharma Santosh Kumar M. Ravi Kumar
author_sort	Ketan Singha Roy
title	Effect of coronavirus lockdowns on the ambient seismic noise levels in Gujarat, northwest India
title_short	Effect of coronavirus lockdowns on the ambient seismic noise levels in Gujarat, northwest India
title_full	Effect of coronavirus lockdowns on the ambient seismic noise levels in Gujarat, northwest India
title_fullStr	Effect of coronavirus lockdowns on the ambient seismic noise levels in Gujarat, northwest India
title_full_unstemmed	Effect of coronavirus lockdowns on the ambient seismic noise levels in Gujarat, northwest India
title_sort	effect of coronavirus lockdowns on the ambient seismic noise levels in gujarat, northwest india
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/67568c671a1a46bf910a84107befa55e
work_keys_str_mv	AT ketansingharoy effectofcoronaviruslockdownsontheambientseismicnoiselevelsingujaratnorthwestindia AT jyotisharma effectofcoronaviruslockdownsontheambientseismicnoiselevelsingujaratnorthwestindia AT santoshkumar effectofcoronaviruslockdownsontheambientseismicnoiselevelsingujaratnorthwestindia AT mravikumar effectofcoronaviruslockdownsontheambientseismicnoiselevelsingujaratnorthwestindia
_version_	1718393034899456000

Effect of coronavirus lockdowns on the ambient seismic noise levels in Gujarat, northwest India

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