Correction to: Critical zone of the branching crack model for earthquakes: Inherent randomness, earthquake predictability, and precursor modellingJiancang Zhuang, Mitsuhiro Matsu’ura and Peng HanEur. Phys. J. Spec. Top., 230 Suppl 1 (2021) 7DOI: https://doi.org/10.1140/epjs/s11734-021-00213-x