Figure 3

Change in b-value and depth of earthquakes after typhoon Morakot. (a) Notched whisker plots of b-value estimates for 2.5 years before (yellow) and after (green) typhoon Morakot inside the landsliding zone show the median (red line), mean (dot), 25th and 75th percentiles (box limits), whisker lengths (dashed lines) and outliers (purple crosses) of the b-value. Notches display the variability of the median between samples. (b) Histograms of earthquake depth during the 2.5 years before (yellow) and after (green) typhoon Morakot in the landsliding zone. Solid and dashed lines indicate depth-distribution for earthquakes of all magnitudes and magnitudes greater than the completeness magnitude, respectively. (c) Depth distribution of the ratio of the number of earthquakes in the 2.5 years after typhon Morakot, n_after, over the number of earthquakes in the 2.5 years before, n_before. The blue line indicates results considering all earthquakes, the black line indicates results considering the reference declustered catalog and the grey lines indicate results obtained using the 50 declustered catalogues, resulting from a Monte-Carlo sampling of the model parameter space (see “Methods” section).