GPS Measures Deformation in Subduction Zones: Ocean/continent

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North American crustal plates and earthquake epicenters

ERN Item Type: 

  • Videos or Animations

Organization: 

Incorporated Research Institutions for Seismology (IRIS)

Description: 

This animation shows that GPS can record the movement of the leading edge of the overlying continental plate in a subduction zone. The plates are locked and the overlying plate is forced back. When friction is overcome and strain is released, the GPS receiver will snap back toward its original position. This animation is exaggerated to depict the relative motion of plates and GPS as seen in the 2010 Magnitude 8.8 earthquake in Chile where the land in places rebounded 10 meters.

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No

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