PDF file - Laboratoire de Géologie de l'Ecole normale supérieure - Ens

MICROBLOCK ROTATIONS IN SULAWESI, INDONESIA
Figure 6: Best fit block model derived from both GPS and earthquakes slip vector azimuth data. Center: Observed
(pink) and calculated (green) velocities with respect to the Sunda block (shown are 20% confidence ellipses, after GPS
re-weighting; see text). The slip rate deficit (mm/yr) for the faults included in the model is represented by a color bar. .
The profile of figure 7 is located by the dashed black line. The black rectangles around Palu and Gorontalo fault localize
the insets. Top right and bottom left insets show details of the measured and modelled velocities across the Gorontalo
and Palu faults. The bottom right inset shows residual GPS velocities with respect to the model. The value of the
coupling ratio, φ, for the faults included in the model is represented by the color bar. Light blue dots represent the
locations of the fault nodes where the coupling ratio is estimated. Nodes along the block boundaries are at the surface of
the Earth and the others are at depth along the fault plane. In this model, φ is considered uniform along strike and depth
for all the faults, except for Palu Fault and Minahassa Trench where it is allowed to vary along strike.
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