Global models for short-term earthquake forecasting and predictive skill assessment Shyam Nandan, Yavor Kamer, Guy Ouillon, Stefan Hiemer and Didier Sornette Eur. Phys. J. Special Topics, 230 1 (2021) 425-449 Published online: 19 January 2021 DOI: 10.1140/epjst/e2020-000259-3