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Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 New Considerations about Chile’s Seismic Hazard Sergio. Barrientos Scientific Director Servicio.

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Presentation on theme: "Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 New Considerations about Chile’s Seismic Hazard Sergio. Barrientos Scientific Director Servicio."— Presentation transcript:

1 Observatory Earthquake Readiness Workshop, La Serena Dec New Considerations about Chile’s Seismic Hazard Sergio. Barrientos Scientific Director Servicio Sismológico, Universidad de Chile

2 Observatory Earthquake Readiness Workshop, La Serena Dec. 2007

3 Page 3 Energy Released by Earthquakes

4 Observatory Earthquake Readiness Workshop, La Serena Dec Data from Engdahl and Villaseñor (2003).

5 Observatory Earthquake Readiness Workshop, La Serena Dec Wadati-Benioff Zone Barazangi and Isacks (1976) Engdhal and Villaseñor (2003)

6 Observatory Earthquake Readiness Workshop, La Serena Dec Beck et al, 1998

7 Page 7 Thrust Sismos Prisma Outerise Intraplaca prof. Intermedia Corticales Seismic Sources in Chile fosa costa

8 Observatory Earthquake Readiness Workshop, La Serena Dec. 2007

9 Barrientos (1997)

10 Observatory Earthquake Readiness Workshop, La Serena Dec Chillan, 1939 Beck et al., (1998)

11 Observatory Earthquake Readiness Workshop, La Serena Dec Fault size: Length: 1000 km Width: variable km Average displ: 17 m Maximum displ: m Recurrence: At least 500-yr

12 Page 12 Pre-1960 Events (Cisternas et al., 2005)

13 Observatory Earthquake Readiness Workshop, La Serena Dec Dec, 1949, Magallanes

14 Observatory Earthquake Readiness Workshop, La Serena Dec Illapel, 1997 Outer rise 1939, 1950, Trench

15 Observatory Earthquake Readiness Workshop, La Serena Dec Magh (km)p.a.Reference Santiago g Lepe y Torre (1950) Las Melosas g Piderit y Lomnitz (1960) La Ligua g Malgrange et al. (1981) La Ligua g Malgrange et al. (1981) M=7.5 every 110 yr

16 Observatory Earthquake Readiness Workshop, La Serena Dec E S (1) E S (2) Tarapacá, 2005 January 7, 2003 Mw 5.9

17 Tarapacá, 2005

18 Observatory Earthquake Readiness Workshop, La Serena Dec Attenuation relationships Saragoni et al. Barrientos (1981)

19 Montessus de Ballore Conference Santiago, Chile, Nov. 2006

20 Observatory Earthquake Readiness Workshop, La Serena Dec Martin (1991)

21 Observatory Earthquake Readiness Workshop, La Serena Dec Brief Update of the Earthquakes in Tocopilla Mw= 7.7 and Aysén Mw= 6.2

22 Observatory Earthquake Readiness Workshop, La Serena Dec Graber (1997)

23 Page 23 Coseismic Displacement, Antofagasta 30 Julio 1995 Mw=8.0 Melbourne et al.., 2002 De Louis et al., 1997

24 Observatory Earthquake Readiness Workshop, La Serena Dec Coseismic Displacement, Antofagasta 30 Julio 1995 Mw=8.0

25 Observatory Earthquake Readiness Workshop, La Serena Dec Coseismic Displacement, Tocopilla 14 Nov 2007 Mw=7.7

26 Observatory Earthquake Readiness Workshop, La Serena Dec. 2007

27 Page 27 J. Cembrano (2007) AYSÉN Marco Tectónico

28 Evolución de la Sismicidad Page Apr 06 M=

29 Page 29 Caída de Rocas, Deslizamientos y Tsunami 21 Abril 2007

30 Page 30 Generacion de Tsunami

31 Page 31 Punta Tortuga

32 Page 32 Epicenters and Focal Mechanisms

33 Observatories Earthquake Readiness Workshop, La Serena Dec Thanks a lot for your attention

34 VI Congreso Chileno de Geotecnia Valparaíso, Nov Murdie (1993)

35 VI Congreso Chileno de Geotecnia Valparaíso, Nov. 2007

36

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