  A discretized version of the Burridge-Knopoff train model with (non-linear
friction force replaced by) random pinning is studied in one and two
dimensions. A scale free distribution of avalanches and the Omori law type
behaviour for after-shocks are obtained. The avalanche dynamics of this model
becomes precisely similar (identical exponent values) to the Edwards-Wilkinson
(EW) model of interface propagation. It also allows the complimentary
observation of depinning velocity growth (with exponent value identical with
that for EW model) in this train model and Omori law behaviour of after-shock
(depinning) avalanches in the EW model.
