Democratizing earthquake predictability research: introducing the RichterX platform Yavor Kamer, Shyam Nandan, Guy Ouillon, Stefan Hiemer and Didier Sornette Eur. Phys. J. Special Topics, 230 1 (2021) 451-471 Published online: 19 January 2021 DOI: 10.1140/epjst/e2020-000260-2