Abstract
In oblique convergent subduction areas, an obliquity increase should produce a slip rate increase on trench parallel strike‐slip faults and thus the fore‐arc platelet should be stretched. Along the Great Sumatran Fault (GSF), that is associated with the oblique convergent Sunda Arc, a northward increase of the GSF slip rate occurs parallel with the convergence obliquity. Transpressional back‐arc deformation accommodates part of the GSF slip rate variation while no significant fore‐arc stretching is observed. The Sumatran case shows that oblique convergence may be accommodated by deformation of a 500‐km‐wide zone, from the fore‐arc to the back‐arc domains.
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