Distributions of CC
(a to h) for earthquake pairs with a large hypocenter separation. The red bars represent the probability density for CCmax calculated for widely separated (>30 km) phase pairs. They are normalized so that their total area is unity. The blue curves are GEV distributions fitted to the probability density distributions. The green dashed lines show the 95th percentile of the distribution, which is used to determine the thresholds. The number of phase pairs used is shown at the upper-left corner of each panel.