Seismic data could be used under certain conditions as a proxy to monitor the level of human activity in urban environments, providing similar details to those offered by other common mobility indicators, according to a new study made by researchers from Geosciences Barcelona—CSIC. Seismologist Jordi Díaz is the leading author of the study that has been published recently in the journal Solid Earth. Mario Ruiz and José Antonio Jara, the from Institut Cartográfic i Geologic de Catalunya (ICGC) are the other authors of the study.