Dynamical complexity in Swarm electron density time series using Block entropy G. Balasis, C. Papadimitriou, A. Z. Boutsi, I. A. Daglis, O. Giannakis, A. Anastasiadis, P. De Michelis and G. Consolini EPL, 131 6 (2020) 69001 Published online: 02 November 2020 DOI: 10.1209/0295-5075/131/69001