Validation of Velocity the Lower Tagus Valley (Portugal) velocity model using H/V technique
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Publication Date: | 2010 |
Other Authors: | , , |
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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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 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
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 |
eu_rights_str_mv |
openAccess |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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