Fig. 4

a Map view of relative location errors for the 386 aftershocks along the Palu-Koro Fault Zone; b depth view along latitude; and c depth view along longitude. Relative horizontal and vertical error ellipses are shown at the 95% confidence level. Ellipses are computed from the major axes of the horizontal and vertical projection of the 95% confidence ellipsoids obtained from a bootstrap analysis of the final double-difference vector