Data and Resources
The DAS data used in this study are collected by the Penn State FORESEE
array of underground telecommunication fiber optic cables. Calculated
seismic noise level and raw DAS data used for plotting figures in this
paper are available for download at
https://doi.org/10.5281/zenodo.4072484. The mobility data are released
by Google at https://www.google.com/covid19/mobility/ (last accessed: 25
September 2020). We used ArcGIS Pro to make Figure 1a. Supplemental
Material for this article includes: 1) methods about the calculation of
the RMS noise changes; 2) a description of Mobility Data we used; 3) two
figures of temporal noise level changes at Ch 204 and 1491.