The equations of motion for a two block, driven, spring loaded fault model with asymmetric frictional forces are iterated in the chaotic regime.4,5 The seismic moment, M0, of each failure episode whose moment exceeds a threshold, M0t, is recorded together with the time, T, since the last significant event (M0>M0t). Preliminary results from prediction-regression analysis indicate that the distribution of points in M0-T space takes the form of a map, M0(t),T(t) determining the values of M0(t+1),T(t+1). It is suggested that such analysis on real data would be helpful in assessing the applicability of such low-dimensional systems to earthquake modeling and may prove useful in the prediction of real events. ¿American Geophysical Union 1992