Fig. 4: Relationship between the Weibull shape parameters and the fault characteristics.

The x axis is earthquake rate per year (on log10 scale) estimated from a Poisson process. The y axis is the mean of the log shape parameter of the Weibull renewal process fitted to each fault segment. The larger the shape parameter, the more periodic the behaviour. Note that some of the pattern observed will be influenced by the number of earthquakes along each fault segment, which is not plotted.