Complex dynamics in the two spring-block model for earthquakes with fractional viscous damping G. B. Tanekou, C. F. Fogang, F. B. Pelap, R. Kengne, T. F. Fozin and B. R. N. Nbendjo Eur. Phys. J. Plus, 135 7 (2020) 545 Published online: 05 July 2020 DOI: 10.1140/epjp/s13360-020-00558-7