Discussion on: “Kalman filtering for neural prediction of response spectra from mining tremors”

The paper by Agnieszka Krok and Zenon Waszczyszyn [Krok A, Waszczyszyn Z. Kalman filtering for neural prediction of response spectra from mining tremors. Computer Structure 2007;85:1257–63] is commented. The question of practical applicability of the acceleration response spectra of mining tremors is raised.