Correlation between fluxgate and SQUID magnetometer data sets for geomagnetic stormsThabang Matladi, Elda Saunderson, Daniel Gouws, Temwani-Joshua Phiri, Christian Kwisanga and Coenrad FourieE3S Web of Conferences, 4 (2014) 02002DOI: https://doi.org/10.1051/e3sconf/20140402002