Monitoring geomagnetic signals of groundwater movement using multiple underground SQUID magnetometersS. Henry, E. Pozzo di Borgo, C. Danquigny, A. Cavaillou, A. Cottle, S. Gaffet and M. PipeE3S Web of Conferences, 4 (2014) 02004DOI: https://doi.org/10.1051/e3sconf/20140402004