Asymmetric Cellular Automaton Modeling Earthquakes
  We propose an asymmetric modification of the sand-pile-like cellular automaton for earthquake modeling. The cumulative event distribution is shown to be dependent on the asymmetry parameter. 
P.G.Akishin, M.V.Altaisky, A.D.Budnik, V.V.Ivanov (Joint Institute for   Nuclear Research) and I.Antoniou (International Sol...