Analysis of magnetic data of ground station network during strong magnetic storms Oksana Mandrikova, Igor Solovev, Sergey Khomutov, Dmitry Baishev and Phani Chandrasekhar E3S Web Conf., 20 (2017) 02008 Published online: 24 October 2017 DOI: 10.1051/e3sconf/20172002008