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Sergio Barrientos Director Científico Servicio Sismológico Universidad de Chile sbarrien@dgf.uchile.cl

Terremotos en Chile

26 Marzo 2012 UNESCO Workshop Santiago - Chile

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World Seismicity 0-70 km 70-300 km 300-700 km

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Vigny, 2008

Marco Tectónico

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Subduction Factory

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Thrust Prism

Outerise

Intraplate, Intermediate depth

Shallow crustal

Seismogenic Sources in Chile

fosa

cost

a

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Large Earthquakes in Chile

Astroza and Ruiz (2010)

In general, one quake M >7 ¾ every 10 yr

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Acelerógrafos 27 Feb 2010

Ruiz et al. (2012)

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Réplicas

Lange et al (2012)

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Slip Distributions

Shao et al., UCSB USGS Sladen, Caltech

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Ruptura 2010 Chile

Eric Kiser, Harvard

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Crustal Deformation

CAP

Fault

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Coastal Uplift

Vargas et al. (2010)

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Crustal Deformation

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Vigny et al, 2011

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Vigny et al., 2011 Lorito et. al., 2011

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Generación de Tsunamis

displaces a large enough volume of water. Plate slips, causing subsidence and releasing energy into water.

Overriding plate bulges under strain, causing uplift

Accumulation of stresses

Tsunami