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Funded
in part by  |
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Three
tectonic domains of the Sumatran plate boundary. In the southern
domain, the trench-slope break, outer-arc ridge, forearc basin and
Sumatran fault are the least irregular. In the Central domain,
the fore-arc region is splintered by secondary faults, the Sumatran
fault strikes markedly across the subduction isobaths. The
Investigator fracture zone (IFZ) is subducting beneath the Central
domain. These structural features seem to play a role in determining
the source parameters of large earthquakes. Velocity vectors
are from 1990s GPS campaigns.
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