South America - Earthquakes and Tectonics


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    Megathrust Earthquakes

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Tectonics of South America

More than one-quarter of the world's “Great” magnitude 8 or larger earthquakes have occurred in western South America, including the 1960 magnitude 9.5 Chile megathrust earthquake, the largest earthquake ever recorded.
An array of earthquakes are generated by Nazca-South American plate boundary and intra-plate tectonic processes. This animation explores three major mechanisms for earthquakes due to the interaction of the plates:
• Tsunami-generating megathrust earthquakes on the Nazca –South America plate boundary,
• Major earthquakes within the subducting plate beneath populated coastal towns, and
• Major earthquakes on faults within the continental crust.

 mp4 (31.8 MB)


En Español

 mp4 (29.9 MB)








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