Figure 13. Cumulative earthquake occurrence rates [N(m)] for the three functional forms of the Gutenburg-Richter curves of Anderson and Luco (1983), using b = 1.00 Figure 4b. These models depend on (1) N₁ = 10^a–bM H (M_max – M) the rate of occurrence at a reference magnitude, (2) n₂ = –dN₂/dM = 10^a–bM H(M_max = M) a b-value, and (3) n₃ = –dN₃/dM = (10^a–bM – 10^a–bMmax) H(M_max = M) the maximum magnitude, M_max. The plots have been normalized using a moment-release rate of 11.3 x 10²⁵ dyne cm/yr corresponding to the most likely maximum estimate determined from historical seismicity. To match the moment release rate M_max is set to 7.58, the largest event in the catalog for N₁, M_max = 8 for n₂, and M_max = 8.2 for n₃.