Crustal Deformation at the Sumatran Subduction Zone Revealed by Coral Rings

Details Crustal Deformation at the Sumatran Subduction Zone Revealed by Coral Rings Crustal Deformation at the Sumatran Subduction Zone Revealed by Coral Rings

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3141s&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 20, p. 3141-3144

Physics

18

Geodesy And Gravity: Crustal Movements-Interplate, Tectonophysics: Dynamics, Seismotectonics, Tectonophysics: Plate Motions-Present And Recent

Scientific paper

Analyses of coral rings grown in the interval 1970-1997 reveal a geographically distinct pattern of interseismic uplift off Sumatra's western coast. At distances less than 110 km from the Sumatran trench, coral reefs are submerging as fast as 5 mm/y. At 130 and 180 km distance from the trench, they are emerging at similar rates. We suggest that a locked, or partially locked patch, located above 30 km depth on the upper surface of the subducting oceanic plate, generates this pattern.

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