Crustal Deformation at the Sumatran Subduction Zone Revealed by Coral Rings

نویسندگان

  • Kerry Sieh
  • Steven N. Ward
  • Danny Natawidjaja
  • Bambang W. Suwargadi
چکیده

Analyses of coral rings grown in the interval 19701997 reveal a geographically distinct pattern of interseismic uplift off Sumatra's western coast. At distances less than 1 10 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 hat 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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تاریخ انتشار 2007