Advertisement

Natural Hazards

, Volume 26, Issue 3, pp 227–243 | Cite as

Earthquake Hazard Assessment in the Oran Region (Northwest Algeria)

  • Youcef Bouhadad
  • Nasser Laouami
Article

Abstract

This paper deals with the probabilistic seismic hazard analysis carried out in the Oran region, situated in the Northwest of Algeria. This part of Algeriawas historically struck by strong earthquakes. It was particularly affected during theOctober 9, 1790 Oran earthquake of intensity X. The main purpose of this work is to assessseismic hazard on rocks in order to provide engineers and planners with a basic tool for seismicrisk mitigation. The probabilistic approach is used in order to take into account uncertaintiesin seismic hazard assessment. Seismic sources are defined in the light of the most recentresults obtained from seismotectonics analyses carried out in North Algeria.Source parameters such as b-values, slip rate and maximum magnitude are assessed for eachseismic source. The attenuation of ground shaking motion with distance is estimated byusing attenuation relationships developed elsewhere throughout the world (Sadigh et al., 1993; Ambraseys and Bommer, 1991). The two relationships agree well with the local data. Differentchoices of source parameter values and attenuation relationships are assigned weights in alogic tree model. Results are presented as relationships between values of peak groundacceleration (PGA) and annual frequency of exceedance, and maps of hazard for returnperiods of 200 years and 500 years. A maximum peak ground acceleration of 0.42 g is obtainedfor the Oran site for a return period of 500 years.

probabilistic analysis Algeria hazard maps rocks seismic source parameters attenuation law 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Ambraseys, N. N. and Bommer, J. J.: 1991, The attenuation of ground accelerations in Europe, Earthquake Eng.Struct.Dyn. 20, 1179-1202.Google Scholar
  2. Aoudia, A. and Meghraoui, M.: 1995, Seismotectonics in the Tell Atlas of Algeria: The Tenes-Abou-El hassan earthquake of 25/08/1922 M = 6.0, Tectonophysics 248, 263-276.Google Scholar
  3. Aoudia, A., Vaccari, F., Suhadolc, P., and Meghraoui, M.: 2000, Seismogenic potential and earthquake hazard assessment in the Tell Atlas of Algeria, Journal of Seismology 4, 79-98.Google Scholar
  4. Benouar, D.: 1994, The seismicity of Algeria and adjacent regions, Annali di geofisica 37, 459-862.Google Scholar
  5. Benouar, D., Aoudia, A., Maouche, S., and Meghraoui, M.: 1994, The August 18, 1994 Mascara earthquake-A quick look report, Terra-nova 6, 634-637.Google Scholar
  6. Benouar, D., Molas, G. L., and Yamazaki, F: 1996, Earthquake hazard mapping in the Maghreb countries, Earthq.Eng.& Struct.Dyn. 25, 1151-1164.Google Scholar
  7. Bezzeghoud, M. and Bufforn, E.: 1999, Source parameters of the 1992 Melilla (Spain, M w = 4.8), 1994 Alhoceima (Morocco, M W = 5.8), 1994 and Mascara (Algeria,M W = 5.7) earthquakes and seismotectonics implications', Bull.Seismol.Soc.Am. 89(2), 359-372.Google Scholar
  8. Bouhadad, Y.: 1997, Tectonique active et aléa sismique dans le bassin de Chelif occidental, Proceedings.Etat de l'art et perspectives en prévention sismique, IGC-USTO et CRAAG, 32 pp.Google Scholar
  9. CGS (Centre National de Recherche Appliquée en Génie Parasismique): 1995, The Benichougrane earthquake of August 18, 1994. Preliminary technical report, CGS, 40 pp.Google Scholar
  10. Cornell, C. A.: 1968, Engineering seismic risk analysis, Bull.Seismol.Soc.Am. 58, 1583-1606.Google Scholar
  11. Cornell, C. A. and Van Marke, E. H.: 1969, The major influence on seismic risk, Proceedings of the Third Conference on Earthquake Engineering, Vol. A-1, Santiago, Chile, pp. 69-93.Google Scholar
  12. CRAAG (Centre de Recherche en Astronomie Astrophysique et Géophysique): 1994, Les séismes de l'Algérie de 1365... 1992, Publication du CRAAG, Alger, 227 pp.Google Scholar
  13. De Mets, C. R., Gordon, R. G., Argus, D. F., and Stein, S.: 1990, Current plate motions, Geophy.J.Inter. 101, 425-478.Google Scholar
  14. El Ghobrini, M.: 1986, Evolution morphostructurale de la marge algérienne occidentale (Méditerranée occidentale): Influence de la néotectonique et de la sédimentation, Thèse doct., University of Sorbonne, France, 164 pp.Google Scholar
  15. Geomatrix Consultants: 1993, Probabilistic seismic hazard analysis computer program: A user manual.Google Scholar
  16. Gutenberg, B. and Richter, C. F.: 1954, Seismicity of the Earth and Associated Phenomena, Princeton University Press, NJ, 310 pp.Google Scholar
  17. Jiménez, M. J., Garcia-Fernandez, and the GSHAP Ibero-Maghreb Working Group: 1999, Seismic hazard assessment in the Ibero-Maghreb Region, Annali di Geofisica 42, 1057-1066.Google Scholar
  18. Kijko, A. and Sellevoll, M. A.: 1989, Estimation of earthquake hazard parameters from incomplete data files. Part II. Incorporation of magnitude heterogeneity, Bull.Seismol.Soc.Am. 82(1), 120-134.Google Scholar
  19. Laouami, N.: 1998, Etude expérimentale sur l'atténuation du mouvement sismique. Elaboration de lois d'atténuation empiriques pour les régions de l'Algérie du Nord. Rapport interne CGS, 55 pp.Google Scholar
  20. McGuire, R. K.: 1976, FRISK: Computer program for seismic risk analysis using faults as earthquake sources, U.S.Geological Survey. Open file report 78-1007.Google Scholar
  21. McGuire, R. K.: 1993, Computations of seismic hazard, Annali di geofisica XXXVI(3-4), 181-200.Google Scholar
  22. McKenzie, D. P.: 1972, Active tectonics of theMediterranean region, Geophy.J.Resear. 30, 109-185.Google Scholar
  23. Meghraoui, M.: 1988, Géologie des zones sismiques du Nord de l'Algérie.Paléosismologie, tectonique active et synthèse sismotectonique, Thèse Doct., University Paris Sud France, 356 pp.Google Scholar
  24. Meghraoui, M.: 1990, Blind reverse faulting system associated with the Mont Chenoua-Tipaza earthquake of 29 October 1989 (North central Algeria), Terra nova 3, 84-93.Google Scholar
  25. Meghraoui, M., Philip, H., Albarede, F., and Cisternas, S. A.: 1988, Trench investigations through the trace of the 1980 El Asnam thrust fault: Evidence for paleoseismology, Bull.Seismol.Soc.Am. 78(2), 979-999.Google Scholar
  26. Meghraoui, M., Morel, J. L., Andrieux, J., and Dahmani, M.: 1996, Tectonique plio-quaternaire de la chaîne tello-rifaine et de la mer d'Alboran. Une zone complexe de convergence continentcontinent, Bull.Soc., Géol.France t.167(1), 141-157.Google Scholar
  27. Merrits, D. and Bull, W. B.: 1989, Quaternary uplift rates at the Mendocino triple junction, Northern California from uplifted marine terraces, Geology 17, 1020-1024.Google Scholar
  28. Morgat, C. and Shah, H. C.: 1978, Seismic hazard analysis of Algeria, Report J. A. Blume Earthq. Eng. Center, Stanford University.Google Scholar
  29. NRC (National Research Council): 1988, Probabilistic Seismic Hazard Analysis, National Academy Press, Washington, D.C. 96 pp.Google Scholar
  30. Philip, H. and Thomas, G.: 1977, Détermination de la direction de raccourcissement de la phase de compression quaternaire en Oranie (Algérie), Revue de Géographie Physi.Géol.Dynam. XIX, fasc.4, 315-324.Google Scholar
  31. Philip, H. and Meghraoui, M.: 1983, Structural analysis and interpretation of the surface deformation of the El Asnam earthquake of October 1980, Tectonics 2, 17-49.Google Scholar
  32. Philip, H.: 1987, Plioquaternary evolution of the stress field in Mediterranean zones of subduction and collision', Ann.Geophys. 5B, 301-320.Google Scholar
  33. Sadigh, K., Chang, C. Y., Abrahamson, N. A., Chiou, S. J., and Power, M. S.: 1993, Specification of long period ground motion. Updated attenuation relationships for rock site conditions and adjustment factors for near fault effects, Proceedings of ATC-17-1 Seminar on Seismic Isolation, Passive Energy Dissipation, and Active Control, 11-12 March, San Francisco, CA, pp. 59-70.Google Scholar
  34. Swan, F. H.: 1988, Temporal clustering of paleoseismic events on the Oued Fodda fault, Algeria, Geology 16, 1092-1095.Google Scholar
  35. Thomas, G.: 1985, Géodynamique d'un bassin intramontagneux.Le bassin de Chellif occidental (Algérie ) durant le mio-plio-quaternaire, Thèse. Doct., University de Pau et pays de l'Addour, France, 548 pp.Google Scholar
  36. Toro, G. R.: 1995, Probabilistic seismic hazard analysis: A review of the state of the art, Proceedings of the 5th Intern.Conf.Seis.Zon., 17-19 October, 1995, Nice-France, III, pp. 1829-1856.Google Scholar
  37. Wells, D. L. and Coppersmith, K. J.: 1994, Updated empirical relationships among magnitude, rupture length, rupture area, and surface displacement, Bull.Seismol.Soc.Am. 84, 974-1002.Google Scholar
  38. WCC (Woodward Clyde Consultants): 1984, Seismic microzonation of Ech-Chellif region, Algeria. Report prepared for C.T.C., Algiers, 1, CTC, Algeria, 145 pp.Google Scholar
  39. Yielding, G, Ouyed, M., King, G. C. P., and Hazfeld, D.: 1989, Active tectonics of the Algeria Atlas mountains. Evidence from aftershocks of the 1980 El-Asnam earthquake. Geophy.J.Inter. 99, 761-788.Google Scholar
  40. Youngs, R. R. and Coppersmith, K. J.: 1985, Implication of fault slip rates and earthquakes recurrence models to probabilistic seismic hazard estimates, Bull.Seismol.Soc.Am. 75, 939-964.Google Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Youcef Bouhadad
    • 1
  • Nasser Laouami
    • 1
  1. 1.National Center of Applied Research in Earthquake Engineering, C.G.S.AlgerAlgeria

Personalised recommendations