1. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 New Considerations about Chile’s Seismic Hazard Sergio. Barrientos Scientific Director Servicio Sismológico, Universidad de Chile sbarrien@dgf.uchile.cl

2. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007

3. Page 3 Energy Released by Earthquakes

4. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 Data from Engdahl and Villaseñor (2003).

5. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 Wadati-Benioff Zone Barazangi and Isacks (1976) Engdhal and Villaseñor (2003)

6. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 1922 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. 2007 Chillan, 1939 Beck et al., (1998)

11. 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

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

13. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 Dec, 1949, Magallanes

14. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 Illapel, 1997 Outer rise 1939, 1950, 2005 2004 Trench

15. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 Magh (km)p.a.Reference Santiago 19457.1710.13g Lepe y Torre (1950) Las Melosas 19586.95 -100.05g Piderit y Lomnitz (1960) La Ligua 19657.1720.19g Malgrange et al. (1981) La Ligua 19717.5300.17g Malgrange et al. (1981) M=7.5 every 110 yr

16. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 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. 2007 Attenuation relationships Saragoni et al. Barrientos (1981)

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

20. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 Martin (1991)

21. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 Brief Update of the Earthquakes in Tocopilla Mw= 7.7 and Aysén Mw= 6.2

22. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 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. 2007 Coseismic Displacement, Antofagasta 30 Julio 1995 Mw=8.0

25. Observatory Earthquake Readiness Workshop, La Serena Dec. 2007 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 28 21 Apr 06 M= 6.2 5.2 4.4 4.8 5.1 4.5 5.6 5.5

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. 2007 Thanks a lot for your attention

34. VI Congreso Chileno de Geotecnia Valparaíso, Nov. 2007 Murdie (1993)

35. VI Congreso Chileno de Geotecnia Valparaíso, Nov. 2007