New Considerations about Chiles Seismic Hazard Sergio Barrientos
New Considerations about Chile’s Seismic Hazard Sergio. Barrientos Scientific Director Servicio Sismológico, Universidad de Chile sbarrien@dgf. uchile. cl Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Energy Released by Earthquakes Page 3
Data from Engdahl and Villaseñor (2003). Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Wadati-Benioff Zone Barazangi and Isacks (1976) Engdhal and Villaseñor (2003) Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
1922 Beck et al, 1998 Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Seismic Sources in Chile Corticales Sismos Prisma costa fosa Outerise Thrust Intraplaca prof. Intermedia Page 7
Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Barrientos (1997) Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Chillan, 1939 Beck et al. , (1998) Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Fault size: Length: 1000 km Width: variable 120 -150 km Average displ: 17 m Maximum displ: 35 -40 m Recurrence: At least 500 -yr Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Pre-1960 Events (Cisternas et al. , 2005) Page 12
Dec, 1949, Magallanes Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Trench 2004 Outer rise 1939, 1950, 2005 Trench Illapel, 1997 Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Mag h (km) p. a. Reference Santiago 1945 7. 1 71 0. 13 g Lepe y Torre (1950) Las Melosas 1958 6. 9 5 -10 0. 05 g Piderit y Lomnitz (1960) La Ligua 1965 7. 1 72 0. 19 g Malgrange et al. (1981) La Ligua 1971 7. 5 30 0. 17 g Malgrange et al. (1981) Observatory Earthquake Readiness Workshop , La Serena Dec. 2007 M=7. 5 every 110 yr
Tarapacá, 2005 January 7, 2003 Mw 5. 9 ES(1) ES(2) Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Tarapacá, 2005
Attenuation relationships Barrientos (1981) Saragoni et al. Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Montessus de Ballore Conference Santiago, Chile, Nov. 2006
Martin (1991) Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Brief Update of the Earthquakes in Tocopilla Mw= 7. 7 and Aysén Mw= 6. 2 Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Graber (1997) Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Coseismic Displacement, Antofagasta 30 Julio 1995 Mw=8. 0 De Louis et al. , 1997 Melbourne et al. . , 2002 Page 23
Coseismic Displacement, Antofagasta 30 Julio 1995 Mw=8. 0 Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Coseismic Displacement, Tocopilla 14 Nov 2007 Mw=7. 7 Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
Observatory Earthquake Readiness Workshop , La Serena Dec. 2007
AYSÉN Marco Tectónico J. Cembrano (2007) Page 27
Evolución de la Sismicidad 5. 2 21 Apr 06 M= 6. 2 4. 4 4. 8 5. 5 5. 1 4. 5 5. 6 Page 28
Caída de Rocas, Deslizamientos y Tsunami 21 Abril 2007 Page 29
Generacion de Tsunami Page 30
Punta Tortuga Page 31
Epicenters and Focal Mechanisms Page 32
Thanks a lot for your attention Observatories Earthquake Readiness Workshop , La Serena Dec. 2007
Murdie (1993) VI Congreso Chileno de Geotecnia Valparaíso, Nov. 2007
VI Congreso Chileno de Geotecnia Valparaíso, Nov. 2007
VI Congreso Chileno de Geotecnia Valparaíso, Nov. 2007
VI Congreso Chileno de Geotecnia Valparaíso, Nov. 2007
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