Journal
SCIENCE
Volume 369, Issue 6509, Pages 1338-1343Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abd2438
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Funding
- Royal Society University Research Fellowship [URF\R1\180377]
- International Training Course Seismology and Seismic Hazard Assessment - GeoForschungsZentrum Potsdam (GFZ)
- German Federal Foreign Office through the German Humanitarian Assistance program [S08-60 321.50 ALL 03/19]
- Bogazici University Research Fund [BAP 15683]
- Human Frontier Science Program (HFSP project) [RGY0072/2017]
- VIDI project from the Dutch Research Council (NWO project) [864.14.005]
- Air Force Technical Application Center (AFTAC)
- NSF [DGE-1745301]
- UNAM-DGAPA postdoctoral scholarship
- Agencia Nacional de Investigacion y Desarrollo (Scholarship ANID-PFCHA/Doctorado Nacional) [21200903]
- Natural Environment Research Council [NE/R013144/1]
- K.H. Renlund foundation
- New Zealand Earthquake Commission (EQC project) [20796]
- Multidisciplinary Research on the Coronavirus and its Impacts (MRCI) grant from UC Santa Barbara
- AuScope
- Belgian Federal Science Policy [SR/00/305]
- Luxembourg National Research Fund
- HELPOS Project Hellenic Plate Observing System [MIS 5002697]
- CONACYT [299766]
- NERC [NE/R013144/1, NE/V00946X/1] Funding Source: UKRI
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Human activity causes vibrations that propagate into the ground as high-frequency seismic waves. Measures to mitigate the coronavirus disease 2019 (COVID-19) pandemic caused widespread changes in human activity, leading to a months-long reduction in seismic noise of up to 50%. The 2020 seismic noise quiet period is the longest and most prominent global anthropogenic seismic noise reduction on record. Although the reduction is strongest at surface seismometers in populated areas, this seismic quiescence extends for many kilometers radially and hundreds of meters in depth. This quiet period provides an opportunity to detect subtle signals from subsurface seismic sources that would have been concealed in noisier times and to benchmark sources of anthropogenic noise. A strong correlation between seismic noise and independent measurements of human mobility suggests that seismology provides an absolute, real-time estimate of human activities.
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