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Ground motion simulations of the SW Iberia margin: rupture directivity and earth structure effects

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Abstract

In this study, we focus on the region between Gorringe Bank and the Horseshoe Fault located in the SW Iberia margin, which is believed to be the site of the great 1755 earthquake. We model ground motions using an extended source located near the Horseshoe scarp to generate synthetic waveforms using a wave propagation code, based on the finite-difference method. We compare the simulated waveforms, for the Algarve Basin and the Lower Tagus Valley Basin (Portugal), using a 3-D velocity model down to the Moho discontinuity with a simple 1-D layered model. The radiated wave field is very sensitive to the velocity model and a small number of source parameters, in particular, the rupture directivity. The rupture directivity, the strike direction and the fault dimensions are critical to the azimuthal distribution of the maximum amplitude oscillations. We show that the use of a stratified 1-D model is inappropriate in SW Iberia, where sources are located in the oceanic domain and receivers in the continental domain. The crustal structure varies dramatically along the ray paths, with large-scale heterogeneities of low or high velocities. Moreover, combined with the geometric limitations inherent to the region, a strong trade-off between several parameters is often observed; this is particularly critical when studying moderate magnitude earthquakes (M < 6), which constitute the bulk of the seismic catalogue in SW Iberia.

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References

  • Abrantes F, Lebreiro S, Rodrigues T, Gil I, Bartels-Jónsdóttir H, Oliveira P, Kissel C, Grimalt JO (2005) Shallow-marine sediment cores record climate variability and earthquake activity off Lisbon (Portugal) for the last 2000 years. Quat Sci Rev 24:2477–2494

    Article  Google Scholar 

  • Alves TM, Gawthorpe RL, Hunt DW, Monteiro JH (2003) Cenozoic tectonosedimentary evolution of the Western Iberian Margin. Mar Geol 195:75–108

    Article  Google Scholar 

  • Andeweg B, De Vicente G, Cloetingh S, Giner J, Muñoz Martin A (1999) Local stress fields and intraplate deformation of Iberia: variations in spatial and temporal interplay of regional stress sources. Tectonophysics 305:153–164

    Article  Google Scholar 

  • Andrade C (1992) Tsunami generated forms in the Algarve barrier islands (south Portugal). Sci Tsunami Hazards 10(1):21–34

    Google Scholar 

  • Argus DF, Gordon RG, DeMets C, Stein S (1989) Closure of the Africa-Eurasia-North America plate motion circuit and tectonics of the Gloria fault. J Geophys Res 94:5585–5602

    Article  Google Scholar 

  • Baptista MA, Miranda PMA, Chierici F, Zitellini N (2003) New study of the 1755 earthquake source based on multi-channel seismic survey data and tsunami modeling. Nat Hazards Earth Sci Syst 3:333–340

    Article  Google Scholar 

  • Baptista MA, Miranda JM, Luis JF (2006) In search of the 31 March 1761 earthquake and tsunami source. Bull Seismol Soc Am 96(2):713–721

    Article  Google Scholar 

  • Baptista MA, Miranda JM, Lopes FC, Joaquim FL (2007) The source of the 1722 Algarve earthquake: evidence from MCS and tsunami data. J Seismol 11:371–380

    Article  Google Scholar 

  • Barkan US, Brink T, Lin J (2009) Far field tsunami simulations of the 1755 Lisbon earthquake: implications for tsunami hazard to US East Coast and the Caribbean. Mar Geol 264(2009):109–122

    Article  Google Scholar 

  • Ben-Menahem A (1961) Radiation of seismic surface waves from finite moving sources. Bull Seismol Soc Am 51:401–435

    Google Scholar 

  • Bezzeghoud M, Borges JF, Caldeira B (2005) The 2004 and 2005 Sumatra earthquakes. Implications for the Lisbon earthquake. In: 250th anniversary of the 1755 Lisbon Earthquake. International conference, 1–4 November 2005, Lisbon, Portugal, pp 592–598

  • Bezzeghoud M, Borges JF, Caldeira B, Buforn E, Udias A (2008) Seismic activity in the Azores Region in the context of the western part of the Eurasia-Nubia plate boundary. In: International seminar on seismic risk and rehabilitation on the 10th anniversary of the July 9 1998 Azores Earthquake, Horta-Azores, 9–13 July, pp 27–31

  • Bird P (2003) An updated digital model of plate boundaries. Geochem Geophys Geosyst 4(3):1027. doi:10.1029/2001GC000252, ftp://element.ess.ucla.edu/PB2002/

  • Borges JF, Fitas AJS, Bezzeghoud M, Teves-Costa P (2001) Seismotectonics of Portugal and its adjacent Atlantic area. Tectonophysics 337:373–387

    Article  Google Scholar 

  • Borges JF, Bezzeghoud M, Buforn E, Pro C, Fitas A (2007) The 1980, 1997 and 1998 Azores earthquakes and its seismotectonic implications. Tectonophysics 435:37–54

    Article  Google Scholar 

  • Borges JF, M Bezzeghoud, B Caldeira, E Buforn (2008) Recent seismic activity in the Azores region. In: International seminar on seismic risk and rehabilitation on the 10th anniversary of the July 9 1998 Azores Earthquake, Horta-Azores, 9–13 July, pp 33–37

  • Brune JN (1970) Tectonic stress and spectra of seismic shear waves. J Geophys Res 75:4997–5009

    Google Scholar 

  • Buforn E, Udías A, Colombás MA (1988) Seismicity, source mechanisms and seismotectonics of the Azores-Gibraltar plate boundary. Tectonophysics 152:89–118

    Article  Google Scholar 

  • Buforn E, Bezzeghoud M, Udías A, Pro C (2004) Seismic sources on the Iberia-African plate boundary and their tectonic implications. Pure Appl Geophys 161

  • Buforn E, Udías A, Martín Dávila J (2007) Source mechanism of the February 12, 2007, San Vicente Cape earthquake Mw = 5.9, Orfeus Newsletter, 7, No. 2

  • Caldeira B, Bezzeghoud M, Borges JF (2009) DIRDOP: a directivity approach to determining the seismic rupture velocity vector. J Seismol, in open access. doi:10.1007/s10950-009-9183-x

  • Calvert A, Sandvol E, Seber D, Barazangi M, Roecker S, Mourabit T, Vidal F, Alguacil G, Jabour N (2000) Geodynamic evolution of the lithosphere and upper mantle beneath the Alboŕan region of the western Mediterranean: constraints from travel time tomography. J Geophys Res 105:10871–10898

    Article  Google Scholar 

  • Carrilho F, Teves-Costa P, Morais I, Pagarete J, Dias R (2004) Geoalgar Project—first results on seismicity and fault-plane solutions. Pure Appl Geophys 161(3):589–606

    Article  Google Scholar 

  • Chen WP, Grimison N (1989) Earthquakes associated with diffuse zones of deformation in the oceanic lithosphere: some examples. Tectonophysics 166:133–150

    Article  Google Scholar 

  • Chester DK, Chester OK (2010) The impact of eighteenth century earthquakes on the Algarve region, southern Portugal. Geogr J 176(4):350–370. doi:10.1111/j.1475-4959.2010.00367.x2

    Article  Google Scholar 

  • Dawson AG, Hindson R, Andrade C, Freitas C, Parish R, Bateman M (1995) Tsunami sedimentation associated with the Lisbon earthquake of 1 November AD 1755: Boca do Rio, Algarve, Portugal. Holocene 5(2):209–215

    Article  Google Scholar 

  • DeMets C, Gordon RG, Argus DF, Stein S (1994) Effect of recent revisions to the geomagnetic reversal time scale and estimates of current plate motions. Geophys Res Lett 21:2191–2194

    Article  Google Scholar 

  • Fadil A, Vernant P, McClusky S, Reilinger R, Gomez F, Ben Sari D, Mourabit T, Feigl K, Barazangi M (2006) Active tectonics of the western Mediterranean: geodetic evidence for rollback of a delaminated subcontinental lithospheric slab beneath the Rif Mountains, Morocco. Geology 34(7):529–532

    Article  Google Scholar 

  • Gràcia E, Dañobeitia J, Vergés J, Bartolomé R, Córdoba D (2003) Crustal architecture and tectonic evolution of the Gulf of Cadiz (SW Iberian margin) at the convergence of the Eurasian and African plates. Tectonics 22(4):1033. doi:10.1029/2001TC901045

    Google Scholar 

  • Grandin R, Borges JF, Bezzeghoud M, Caldeira B, Carrilho F (2007a) Simulations of strong ground motion in SW Iberia for the 1969 February 28 (MS = 8.0) and the 1755 November 1 (M ~ 8.5) earthquakes—I. Velocity model. Geophys J Int 171(3):1144–1161

    Article  Google Scholar 

  • Grandin R, Borges JF, Bezzeghoud M, Caldeira B, Carrilho F (2007b) Simulations of strong ground motion in SW Iberia for the 1969 February 28 (MS = 8.0) and the 1755 November 1 (M ~ 8.5) earthquakes—II. Strong ground motion simulations. Geophys J Int 171(2):807–822

    Article  Google Scholar 

  • Gutscher MA, Malod J, Rehault JP, Contrucci I, Klingelhoefer F, Mendes-Victor L, Spackman W (2002) Evidence for active subduction beneath Gibraltar. Geology 30:1071–1074

    Article  Google Scholar 

  • Gutscher M-A, Baptista MA, Miranda JM (2006) The Gibraltar Arc seismogenic zone. Part 2: constraints on a shallow east dipping fault plane source for the 1755 Lisbon earthquake provided by tsunami modeling and seismic intensity. Tectonophysics 426(1–2):153–166

    Article  Google Scholar 

  • Hartzell S et al (2006) Modeling and validation of a 3D velocity structure for the Santa ClaraValley, California, for seismic-wave simulations. Bull Seismol Soc Am 96(5):1851–1881

    Article  Google Scholar 

  • Jiménez-Munt I, Fernàndez M, Torne M, Bird P (2001) The transition from linear to diffuse plate boundary in the Azores-Gibraltar region: results from a thin-sheet model. Earth Planet Sci Lett 192:175–189

    Article  Google Scholar 

  • Johnston A (1996) Seismic moment assessment of earthquakes in stable continental regions—III. New Madrid 1811–1812, Charleston 1886 and Lisbon 1755. Geophys J Int 126:314–344

    Article  Google Scholar 

  • Kagawa T, Zhao B, Miyakoshi K, Irikura K (2004) Modeling of 3D basin structures for seismic wave simulations based on available information on the target area: case study of the Osaka Basin, Japan. Bull Seismol Soc Am 94:1353–1368

    Article  Google Scholar 

  • Larsen SC, Schultz CA (1995) ELAS3D, 2D/3D elastic finite- difference wave propagation code, Lawrence Livermore National Laboratory, UCRLMA-121792, 18 p

  • Larsen S, Antolik M, Dreger D, Stidham C, Schultz C, Lomax A, Romanowicz B (1997) 3D models of seismic wave propagation; simulating scenario earthquakes along the Hayward Fault. Seismol Res Lett 68(2):328

    Google Scholar 

  • Levret A (1991) The effects of the November 1st, 1755 “Lisbon” earthquake in Morocco. Tectonophysics 193:83–94

    Article  Google Scholar 

  • LNEC (1986) A Sismicidade Histórica e a Revisão do Catálogo Sísmico. Laboratório Nacional de Engenharia Civil (LNEC)

  • Lynnes CS, Ruff LJ (1985) Source process and tectonic implications of the great 1975 North Atlantic earthquake. Geophys J R Astron Soc 82:497–510

    Article  Google Scholar 

  • Machado F (1966) Contribuição para o estudo do terremoto do terramoto de 1 de Novembro de 1755, Rev. Fac. Ciências, Lisboa, C14, 19–31

  • Madariaga R (1976) Dynamics of an expanding circular fault. Bull Seismol Soc Am 66(3):639–666

    Google Scholar 

  • Madariaga R, Vigny Ch, Lancieri M, Ruiz S, Métois M, Socquet A, Fuenzalida A, Buforn E, Campos J (2010) The Mw = 8.8 Maule earthquake in Chile: a preliminary view. In: Silva AM, Reis AH, Fitas A, Figueiredo J, Caldeira B, Bezzeghoud M (eds) Jornadas de Física por ocasião da jubilação do Professor Rui Namorado Rosa. Universidade de Évora, Évora, pp 275–290. ISBN 978-989-95091-2-2

    Google Scholar 

  • Mai PM, Spudich P, Boatwright J (2005) Hypocenter locations in finite-source rupture models. Bull Seismol Soc Am 95(3):965–980

    Google Scholar 

  • Martínez-Solares JM, Lopez A, Mezcua J (1979) Isoseismal map of the 1755 Lisbon earthquake obtained from Spanish data. Tectonophysics 53:301–313

    Article  Google Scholar 

  • Matias LM (1996) A sismologia experimental na modelação da estrutura da crusta em Portugal continental, Ph.D. thesis. Univ. of Lisbon, 398 pp.

  • McClusky S, Reilinger R, Mahmoud S, Ben Sari D, Tealeb A (2003) GPS constraints on Africa (Nubia) and Arabia plate motions. Geophys J Int 155:126–138

    Article  Google Scholar 

  • McGuire JJ, Zhao L, Jordan TH (2002) Predominance of unilateral rupture for a global catalog of earthquakes. Bull Seismol Soc Am 92:3309–3317

    Article  Google Scholar 

  • Mendes-Victor L, Baptista MA, Miranda JM, Miranda PMA (1999) Can hydrodynamic modelling of tsunami contribute to seismic risk assessment? Phys Chem Earth 24:139–144

    Google Scholar 

  • Moreira VS (1982) Sismotectónica de Portugal Continental e Região Atlântica adjacente. INMG, Lisboa (in Portuguese)

    Google Scholar 

  • Moreira VS (1984) Sismicidade histórica de Portugal Continental, Revista do Instituto Nacional de Meteorologia e Geofísica, Lisbon, (in Portuguese)

  • Moreira VS (1985) Seismotectonics of Portugal and its adjacent area in the Atlantic. Tectonophysics 11:85–96

    Article  Google Scholar 

  • Olsen KB, Archuleta RJ (1996) Site response in the Los Angeles Basin from 3-D simulations of ground motion. SRL 67(2):49

    Google Scholar 

  • Pereira de Sousa FL (1919) O terremoto do 1◦ de Novembro de 1755 em Portugal e um estudo demográfico (Serviços Geológicos de Portugal), vol I–IV (in Portuguese)

  • Pitarka A, Graves R, Sommerville P (2004) Validation of a 3D velocity model of the Puget Sound region based on modeling ground motion from the 28 February 2001 Nisqually earthquake. Bull Seismol Soc Am 94(5):1670–1689

    Article  Google Scholar 

  • Reid HF (1914) The Lisbon earthquake of November 1, 1755. Bull Seismol Soc Am 4(2):53–80

    Google Scholar 

  • Ribeiro A (2002) Soft plate and impact tectonics, Springer, 324 p

  • Ribeiro A, Cabral J, Baptista R, Matias L (1996) Stress pattern in Portugal mainland and the adjacent Atlantic region, West Iberia. Tectonics 15:641–659

    Article  Google Scholar 

  • Scheffers A, Kelletat D (2005) Tsunami relics on the coastal landscape west of Lisbon, Portugal. Sci Tsunami Hazards 23(1):3–16

    Google Scholar 

  • Somerville PG (2003) Magnitude scaling of the near fault rupture directivity pulse. Phys Earth Planet Int 137:201–207

    Google Scholar 

  • Stich D, Ammon CJ, Morales J (2003) Moment tensor solutions for small and moderate earthquakes in the Ibero-Maghreb region. J Geophys Res 108:2148

    Article  Google Scholar 

  • Terrinha PAG (1998) Structural geology and tectonic evolution of the Algarve basin, South Portugal. PhD thesis, Royal School of Mines, Imperial College, London, 423 pp

  • Terrinha P, Pinheiro LM, Henriet J-P, Matias L, Ivanov MK, Monteiro JH, Akhmetzhanov A, Volkonskaya A, Cunha T, Shaskin P, Rovere M (2003) Tsunamigenic-seismogenic structures, neotectonics, sedimentary processes and slope instability on the southwest Portuguese Margin. Mar Geol 195:55–73

    Article  Google Scholar 

  • Teves-Costa P, Borges JF, Rio I, Ribeiro R, Marreiros C (1999) Source parameters of old earthquakes: semi-automatic digitalization of analog records and seismic moment assessment. Nat Hazards 19:205–220

    Article  Google Scholar 

  • Thiebot E, Gutscher M-A (2006) The Gibraltar Arc seismogenic zone (part 1): constraints on a shallow east dipping fault plane source for the 1755 Lisbon earthquake provided by seismic data, gravity and thermal modeling. Tectonophys Sp Vol “Nat Lab Seismogenic Faults” 427:135–152. doi: 10.1016/j.tecto.2006.02.024

  • Udias A, Buforn E (1994) Seismotectonics of the Mediterranean region. Adv Geophys 36:121–209

    Article  Google Scholar 

  • Udías A, López Arroyo A, Mézcua J (1976) Seismotectonics of the Azores–Alboran region. Tectonophysics 31:259–289

    Article  Google Scholar 

  • Vilanova SP (2003) Sismicidade e Perigosidade Sísmica do Vale Inferior do Tejo. Ph.D. thesis, University of Lisbon, 259 pp

  • Watson DF (1982) Automatic contouring of raw data, computers and geosciences. Pergamon Press Ltd., 1, 8, 97–101

  • Wilson JT (1966) Did the Atlantic close and then re-open? Nature 211:676–681

    Article  Google Scholar 

  • Zitellini N et al (2001) Source of the 1755 Lisbon earthquake and tsunami investigated. EOS Trans Am Geophys U 82:285

    Google Scholar 

  • Zitellini N, Gràcia E, Matias L, Terrinha P, Abreu MA, DeAlteriis G, Henriet JP, Dañobeitia JJ, Masson DG, Mulder T, Ramella R, Somoza L, Diez S (2009) The quest for the Africa–Eurasia plate boundary west of the Strait of Gibraltar. Earth Planet Sci Lett 280:13–50

    Article  Google Scholar 

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Acknowledgments

This work has been developed with the support of the ‘Fundação para a Ciência e a Tecnologia (FCT)’ (Science and Technology Foundation) of the ‘Ministério da Ciência, Tecnologia e do Ensino Superior (MCTES)’, through the projects Topo-Med (TOPOEUROPE/0001/2007), SISMOD/LISMOT (PTDC/CTE-GIN/82704/2006) and WILAS (PTDC/CTE-GIX/097946/2008). The authors acknowledge helpful reviews of anonymous reviewers.

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  1. Geophysical Centre of Évora and Physics Department, ECT, University of Évora, Évora, Portugal

    M. Bezzeghoud, J. F. Borges & B. Caldeira

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  1. M. Bezzeghoud
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  2. J. F. Borges
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  3. B. Caldeira
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Correspondence to M. Bezzeghoud.

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Bezzeghoud, M., Borges, J.F. & Caldeira, B. Ground motion simulations of the SW Iberia margin: rupture directivity and earth structure effects. Nat Hazards 69, 1229–1245 (2013). https://doi.org/10.1007/s11069-011-9925-2

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