Sequential updates for non-abelian SOC models

It is well known that the order in which the sites: of a non-Abelian couple d map lattice model (as the Olami-Feder-Christensen model) are updated dete rmines the final configuration. In order to eliminate this ambiguity one mu st use a parallel update. In this paper we present a simple sequential upda te that is equivalent to the parallel one; we show that it obeys the natura l branching structure of the avalanche. We also show that the main effect o f the other sequential methods, which do not obey the branding structure of the avalanche, is to increase the revisitations of critical sites, which e nhances the number of large avalanches in the lattice.