  We numerically investigate the Olami-Feder-Christensen model on a quenched
random graph. Contrary to the case of annealed random neighbors, we find that
the quenched model exhibits self-organized criticality deep within the
nonconservative regime. The probability distribution for avalanche size obeys
finite size scaling, with universal critical exponents. In addition, a power
law relation between the size and the duration of an avalanche exists. We
propose that this may represent the correct mean-field limit of the model
rather than the annealed random neighbor version.
