Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique

Bibliographic Details
Main Author: Furtado, A
Publication Date: 2010
Other Authors: Borges, JF, Bezzeghoud, M, Caldeira, B
Format: Conference object
Language: eng
Source: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Download full: http://hdl.handle.net/10174/6584
Summary: Along his history the Lower Tagus Valley LTV area was shaken by several earthquakes. The largest reported had their origin in the southwestern part of Iberia. These earth- quakes were destructive, and some of them were produced in large ruptures of offshore structures located southwest of the Portu- guese coastline; other moderates earthqua- kes were produced by local sources such as the 1344, 1531 and the 1909 (Benavente). In the last years, due to 3D structural model improvement and development in numeri- cal methods and computational capacities, several studies have successful obtained strong-ground motion synthesis for the Lower Tagus region using finite difference method [1]. To confirm the velocity model of the LTV sedimentary basin obtained by geophy- sical and geological data, we use broad-band microtremor measurements and application of the horizontal to vertical (H/V) spectral ratio method [2]. Some seismic data collec- ted in a profile with azimuth perpendicu- lar to the basin axis reveals a dependence between the thickness of sediments, the frequency and the amplitude of the low fre- quency peaks (0.15 -1 Hz) of the H/V curve. [1] Grandin R., Borges J.F., Bezzeghoud M., Caldeira B., Carrilho F., 2007. Simulations of strong ground motion in SW Iberia for the 1969 February 28 (MS = 8.0) and the 1755 No- vember 1 (M ~ 8.5) earthquakes – II. Strong ground motion simulations, Geophys. J. Int., Vol. 171, 2, 807-822. [2] Nakamura, Y., 1989, A method for dynamic characteristics estimations of subsurface using microtre- mors on the ground surface, Quarterly Re- port, RTRI, Japan, v. 30, p. 25-33.
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spelling Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V techniqueH/VLower Tagus ValleyVelocity modelAlong his history the Lower Tagus Valley LTV area was shaken by several earthquakes. The largest reported had their origin in the southwestern part of Iberia. These earth- quakes were destructive, and some of them were produced in large ruptures of offshore structures located southwest of the Portu- guese coastline; other moderates earthqua- kes were produced by local sources such as the 1344, 1531 and the 1909 (Benavente). In the last years, due to 3D structural model improvement and development in numeri- cal methods and computational capacities, several studies have successful obtained strong-ground motion synthesis for the Lower Tagus region using finite difference method [1]. To confirm the velocity model of the LTV sedimentary basin obtained by geophy- sical and geological data, we use broad-band microtremor measurements and application of the horizontal to vertical (H/V) spectral ratio method [2]. Some seismic data collec- ted in a profile with azimuth perpendicu- lar to the basin axis reveals a dependence between the thickness of sediments, the frequency and the amplitude of the low fre- quency peaks (0.15 -1 Hz) of the H/V curve. [1] Grandin R., Borges J.F., Bezzeghoud M., Caldeira B., Carrilho F., 2007. Simulations of strong ground motion in SW Iberia for the 1969 February 28 (MS = 8.0) and the 1755 No- vember 1 (M ~ 8.5) earthquakes – II. Strong ground motion simulations, Geophys. J. Int., Vol. 171, 2, 807-822. [2] Nakamura, Y., 1989, A method for dynamic characteristics estimations of subsurface using microtre- mors on the ground surface, Quarterly Re- port, RTRI, Japan, v. 30, p. 25-33.General Assembly of the European Seismological Commission (ESC), September, Montpelier, France2012-12-06T20:18:51Z2012-12-062010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/6584http://hdl.handle.net/10174/6584engFurtado, A., J. Borges, M. Bezzeghoud Bento Caldeira, 2010. Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique General Assembly of the European Seismological Commission (ESC), September, Montpelier, Francenaonaonaondjborges@uevora.ptmourad@uevora.ptbafcc@uevora.pt249Furtado, ABorges, JFBezzeghoud, MCaldeira, Binfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:45:59Zoai:dspace.uevora.pt:10174/6584Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:01:14.157739Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique
title Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique
spellingShingle Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique
Furtado, A
H/V
Lower Tagus Valley
Velocity model
title_short Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique
title_full Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique
title_fullStr Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique
title_full_unstemmed Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique
title_sort Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique
author Furtado, A
author_facet Furtado, A
Borges, JF
Bezzeghoud, M
Caldeira, B
author_role author
author2 Borges, JF
Bezzeghoud, M
Caldeira, B
author2_role author
author
author
dc.contributor.author.fl_str_mv Furtado, A
Borges, JF
Bezzeghoud, M
Caldeira, B
dc.subject.por.fl_str_mv H/V
Lower Tagus Valley
Velocity model
topic H/V
Lower Tagus Valley
Velocity model
description Along his history the Lower Tagus Valley LTV area was shaken by several earthquakes. The largest reported had their origin in the southwestern part of Iberia. These earth- quakes were destructive, and some of them were produced in large ruptures of offshore structures located southwest of the Portu- guese coastline; other moderates earthqua- kes were produced by local sources such as the 1344, 1531 and the 1909 (Benavente). In the last years, due to 3D structural model improvement and development in numeri- cal methods and computational capacities, several studies have successful obtained strong-ground motion synthesis for the Lower Tagus region using finite difference method [1]. To confirm the velocity model of the LTV sedimentary basin obtained by geophy- sical and geological data, we use broad-band microtremor measurements and application of the horizontal to vertical (H/V) spectral ratio method [2]. Some seismic data collec- ted in a profile with azimuth perpendicu- lar to the basin axis reveals a dependence between the thickness of sediments, the frequency and the amplitude of the low fre- quency peaks (0.15 -1 Hz) of the H/V curve. [1] Grandin R., Borges J.F., Bezzeghoud M., Caldeira B., Carrilho F., 2007. Simulations of strong ground motion in SW Iberia for the 1969 February 28 (MS = 8.0) and the 1755 No- vember 1 (M ~ 8.5) earthquakes – II. Strong ground motion simulations, Geophys. J. Int., Vol. 171, 2, 807-822. [2] Nakamura, Y., 1989, A method for dynamic characteristics estimations of subsurface using microtre- mors on the ground surface, Quarterly Re- port, RTRI, Japan, v. 30, p. 25-33.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01T00:00:00Z
2012-12-06T20:18:51Z
2012-12-06
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/6584
http://hdl.handle.net/10174/6584
url http://hdl.handle.net/10174/6584
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Furtado, A., J. Borges, M. Bezzeghoud Bento Caldeira, 2010. Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique General Assembly of the European Seismological Commission (ESC), September, Montpelier, France
nao
nao
nao
nd
jborges@uevora.pt
mourad@uevora.pt
bafcc@uevora.pt
249
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv General Assembly of the European Seismological Commission (ESC), September, Montpelier, France
publisher.none.fl_str_mv General Assembly of the European Seismological Commission (ESC), September, Montpelier, France
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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institution RCAAP
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repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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