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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Using Seismic Noise Levels to Monitor Social Isolation: An Example From Rio de Janeiro, Brazil

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Dias, Fabio L. [1] ; Assumpcao, Marcelo [2] ; Peixoto, Pedro S. [3] ; Bianchi, Marcelo B. [2] ; Collaco, Bruno [2] ; Calhau, Jackson [2]
Total Authors: 6
[1] Natl Observ, Rio De Janeiro - Brazil
[2] Univ Sao Paulo, Seismol Ctr, Sao Paulo - Brazil
[3] Univ Sao Paulo, Dept Appl Math, Inst Math & Stat, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Geophysical Research Letters; v. 47, n. 16 AUG 28 2020.
Web of Science Citations: 0

Decrease of seismic noise level, after reduction of traffic due to the COVID-19 pandemic, has been observed worldwide. The possibility of using seismic noise as another proxy to estimate social isolation was tested with a station within Rio de Janeiro city. We used the isolation index measured from smartphone movement to calibrate the seismic noise levels and estimated an Isolation Seismic Index,ISI(% of the population at home), using the seismic noise energy. Noise levels best correlate with isolation measures in the frequency range 4-8 Hz. Small differences between the smartphone and theISIindexes are interpreted as differences in social activities and noise sources. All mobility indexes are proxies to the actual isolation. AlthoughISIdoes not measure the number of people outside, it measures the number of noise sources (vehicles, trains, factories, etc.) and can be used as additional information to interpret anomalies in other proxies. (AU)

FAPESP's process: 16/18445-7 - Numerical methods for the next generation weather and climate models
Grantee:Pedro da Silva Peixoto
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 17/00159-0 - Green chemistry: monoamine oxidases (MAO) and imine reductases expression for piperidine synthesis
Grantee:José Matheus Camargo Bonatto
Support type: Scholarships in Brazil - Post-Doctorate