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Interseismic coupling and seismic potential along the Central Andes subduction zone
 

Summary: Interseismic coupling and seismic potential along the Central
Andes subduction zone
Mohamed Chlieh,1
Hugo Perfettini,2
Hernando Tavera,3
Jean-Philippe Avouac,4
Dominique Remy,5
Jean-Mathieu Nocquet,1
Frédérique Rolandone,6
Francis Bondoux,5
Germinal Gabalda,5
and Sylvain Bonvalot5
Received 16 December 2010; revised 10 September 2011; accepted 3 October 2011; published 17 December 2011.
[1] We use about two decades of geodetic measurements to characterize interseismic
strain build up along the Central Andes subduction zone from Lima, Peru, to Antofagasta,
Chile. These measurements are modeled assuming a 3-plate model (Nazca, Andean sliver
and South America Craton) and spatially varying interseismic coupling (ISC) on the
Nazca megathrust interface. We also determine slip models of the 1996 Mw = 7.7 Nazca,
the 2001 Mw = 8.4 Arequipa, the 2007 Mw = 8.0 Pisco and the Mw = 7.7 Tocopilla
earthquakes. We find that the data require a highly heterogeneous ISC pattern and that,

  

Source: Avouac, Jean-Philippe - Division of Geological and Planetary Sciences, California Institute of Technology

 

Collections: Geosciences