Figure 9   August CET predictions of multiple regression model using August P, S  & C indices for period used to
develop model (1881-1970) and for 1971-2003 compared with observed August CET 1881-2003 and the model
errors (observed - predicted CET).

Equation: Aug CET = 15.556 + (-0.00869 x Aug P) + (0.05730 x Aug S) + (-0.02384 x Aug C) which explains 44% of variation in Aug CET.