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.