Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/6676 |
Resumo: | On May 21, 2003, the Eastern part of Algiers was struck by an earthquake (Mw=6.8) that injured 11.455 people and caused serious damage in cities close the hypocenter. The purpose of this work is to analyse the rupture directivity of this event using a Doppler Effect approach. The inversion method developed (DIRDOP) (Caldeira et al., 2004) allows an estimation of the rupture direction and velocity from a collection of time pulses, extracted from body waveforms or a relative source time function (RSTF). This seismic data has been downloaded from the IRIS consortium and has a reasonable azimuthal coverage. We have used 30 teleseismic broadband body wave data and 6 relative RSTF obtained from the deconvolution in the time domain (Borges, 2003) using the synthetic Green functions. These are calculated using the Haskell propagator matrix. The results show a bilateral rupture in the E-W direction. In the first 5 seconds the rupture propagates from the epicentre toward the East (N87oE +-13o) with an average velocity of 2.9 0.31km/s. In the last 10 seconds the rupture propagates with the same velocity but in the opposite direction (S84W+- 14o). Both results are coherent with the focal mechanism (strike=64o, dip=50o, rake=83o) and the seismic source obtained elsewhere (Bezzeghoud et al., 2004). REFERENCES Bezzeghoud M., B. Caldeira, J.F. Borges, A. Ayadi and E. Buforn. The Zemmouri-Boumerdes earthquake of may 21st, 2003, mw=6.8: source parameters and rupture propagation study from teleseismic data. XXIX General Assembly of the European Seis- mological Commission (ESC), 12-17 September, Potsdam, this issue. Borges J. F., 2003. Fonte sísmica em Portugal – algumas implicações na geodinâmica da região Açores-Gibraltar. PhD thesis, Universidade de Évora, p. 387 Caldeira B., M. Bezzeghoud and J. Borges, 2004. Seismic source directivity from Doppler effect analysis, part I: Theory. XXIX General Assembly of the European Seismological Commission (ESC), 12-17 September, Potsdam, this issue |
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Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8Rupture ProcesseDirectivityOn May 21, 2003, the Eastern part of Algiers was struck by an earthquake (Mw=6.8) that injured 11.455 people and caused serious damage in cities close the hypocenter. The purpose of this work is to analyse the rupture directivity of this event using a Doppler Effect approach. The inversion method developed (DIRDOP) (Caldeira et al., 2004) allows an estimation of the rupture direction and velocity from a collection of time pulses, extracted from body waveforms or a relative source time function (RSTF). This seismic data has been downloaded from the IRIS consortium and has a reasonable azimuthal coverage. We have used 30 teleseismic broadband body wave data and 6 relative RSTF obtained from the deconvolution in the time domain (Borges, 2003) using the synthetic Green functions. These are calculated using the Haskell propagator matrix. The results show a bilateral rupture in the E-W direction. In the first 5 seconds the rupture propagates from the epicentre toward the East (N87oE +-13o) with an average velocity of 2.9 0.31km/s. In the last 10 seconds the rupture propagates with the same velocity but in the opposite direction (S84W+- 14o). Both results are coherent with the focal mechanism (strike=64o, dip=50o, rake=83o) and the seismic source obtained elsewhere (Bezzeghoud et al., 2004). REFERENCES Bezzeghoud M., B. Caldeira, J.F. Borges, A. Ayadi and E. Buforn. The Zemmouri-Boumerdes earthquake of may 21st, 2003, mw=6.8: source parameters and rupture propagation study from teleseismic data. XXIX General Assembly of the European Seis- mological Commission (ESC), 12-17 September, Potsdam, this issue. Borges J. F., 2003. Fonte sísmica em Portugal – algumas implicações na geodinâmica da região Açores-Gibraltar. PhD thesis, Universidade de Évora, p. 387 Caldeira B., M. Bezzeghoud and J. Borges, 2004. Seismic source directivity from Doppler effect analysis, part I: Theory. XXIX General Assembly of the European Seismological Commission (ESC), 12-17 September, Potsdam, this issueXXIX General Assembly of the European Seismological Commission (ESC), 13-17 September, Potsdam, Germany.2012-12-07T17:39:48Z2012-12-072004-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/6676http://hdl.handle.net/10174/6676engCaldeira B., M. Bezzeghoud and J. F. Borges, 2004. Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8. XXIX General Assembly of the European Seismological Commission (ESC), 13-17 September, Potsdam, Germany.naonaonaobafcc@uevora.ptmourad@uevora.ptjborges@uevora.pt249Caldeira, BBezzeghoud, MBorges, JFinfo: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:RCAAP2024-01-03T18:45:58Zoai:dspace.uevora.pt:10174/6676Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:01:14.067862Repositório 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 |
Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8 |
title |
Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8 |
spellingShingle |
Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8 Caldeira, B Rupture Processe Directivity |
title_short |
Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8 |
title_full |
Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8 |
title_fullStr |
Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8 |
title_full_unstemmed |
Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8 |
title_sort |
Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8 |
author |
Caldeira, B |
author_facet |
Caldeira, B Bezzeghoud, M Borges, JF |
author_role |
author |
author2 |
Bezzeghoud, M Borges, JF |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Caldeira, B Bezzeghoud, M Borges, JF |
dc.subject.por.fl_str_mv |
Rupture Processe Directivity |
topic |
Rupture Processe Directivity |
description |
On May 21, 2003, the Eastern part of Algiers was struck by an earthquake (Mw=6.8) that injured 11.455 people and caused serious damage in cities close the hypocenter. The purpose of this work is to analyse the rupture directivity of this event using a Doppler Effect approach. The inversion method developed (DIRDOP) (Caldeira et al., 2004) allows an estimation of the rupture direction and velocity from a collection of time pulses, extracted from body waveforms or a relative source time function (RSTF). This seismic data has been downloaded from the IRIS consortium and has a reasonable azimuthal coverage. We have used 30 teleseismic broadband body wave data and 6 relative RSTF obtained from the deconvolution in the time domain (Borges, 2003) using the synthetic Green functions. These are calculated using the Haskell propagator matrix. The results show a bilateral rupture in the E-W direction. In the first 5 seconds the rupture propagates from the epicentre toward the East (N87oE +-13o) with an average velocity of 2.9 0.31km/s. In the last 10 seconds the rupture propagates with the same velocity but in the opposite direction (S84W+- 14o). Both results are coherent with the focal mechanism (strike=64o, dip=50o, rake=83o) and the seismic source obtained elsewhere (Bezzeghoud et al., 2004). REFERENCES Bezzeghoud M., B. Caldeira, J.F. Borges, A. Ayadi and E. Buforn. The Zemmouri-Boumerdes earthquake of may 21st, 2003, mw=6.8: source parameters and rupture propagation study from teleseismic data. XXIX General Assembly of the European Seis- mological Commission (ESC), 12-17 September, Potsdam, this issue. Borges J. F., 2003. Fonte sísmica em Portugal – algumas implicações na geodinâmica da região Açores-Gibraltar. PhD thesis, Universidade de Évora, p. 387 Caldeira B., M. Bezzeghoud and J. Borges, 2004. Seismic source directivity from Doppler effect analysis, part I: Theory. XXIX General Assembly of the European Seismological Commission (ESC), 12-17 September, Potsdam, this issue |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-01-01T00:00:00Z 2012-12-07T17:39:48Z 2012-12-07 |
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/10174/6676 http://hdl.handle.net/10174/6676 |
url |
http://hdl.handle.net/10174/6676 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Caldeira B., M. Bezzeghoud and J. F. Borges, 2004. Seismic Source Directivity From Doppler Effect Analysis, Part II: Application To The Zemmouri-Boumerdes (Algeria) Earthquake of May 21st, 2003, Mw=6.8. XXIX General Assembly of the European Seismological Commission (ESC), 13-17 September, Potsdam, Germany. nao nao nao bafcc@uevora.pt mourad@uevora.pt jborges@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 |
XXIX General Assembly of the European Seismological Commission (ESC), 13-17 September, Potsdam, Germany. |
publisher.none.fl_str_mv |
XXIX General Assembly of the European Seismological Commission (ESC), 13-17 September, Potsdam, Germany. |
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RCAAP |
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RCAAP |
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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) |
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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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