Seismological constraints on ice properties at Dome C, Antarctica, from H/V measurements.
International audience The French-Italian Concordia (CCD) seismological station at Dome C is one of two observatories setup on the ice cap in the interior of the Antarctic continent. We analysed the seismic signal due to ambient noise at this station and at three temporary stations 5 km away from Co...
Published in: | Antarctic Science |
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Main Authors: | , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2010
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Online Access: | https://hal.science/hal-00679373 https://hal.science/hal-00679373/document https://hal.science/hal-00679373/file/LevequeEtal2010.pdf https://doi.org/10.1017/S0954102010000325 |
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openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Antarctic seismological stations Concordia firn seismic ambient noise [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Antarctic seismological stations Concordia firn seismic ambient noise [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes Lévêque, Jean-Jacques Maggi, Alessia Souriau, Annie Seismological constraints on ice properties at Dome C, Antarctica, from H/V measurements. |
topic_facet |
Antarctic seismological stations Concordia firn seismic ambient noise [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience The French-Italian Concordia (CCD) seismological station at Dome C is one of two observatories setup on the ice cap in the interior of the Antarctic continent. We analysed the seismic signal due to ambient noise at this station and at three temporary stations 5 km away from Concordia, in order to specify the ice properties beneath them. A method based on the horizontal to vertical (H/V) spectral ratio, commonly used to analyse soil response in seismic regions, was applied to the Antarctic stations. The main peak in the spectral ratios is observed at frequencies 6.7-8 Hz at the Dome C stations, but it is not observed at another station on the ice cap, QSPA, where the sensor is buried at 275m depth. This peak can be explained by a 23m thick unconsolidated snow or firn layer with a low S-wave velocity of 0.7kms-1, overlying a consolidated layer with S-wave velocity 1.8 km s-1. Despite the non-uniqueness of the solutions obtained by fitting the H/V spectra, this model is preferred because the depth of the velocity contrast coincides with the density at which ice particles arrange themselves in a continuous, dense lattice. A small variability of this structure is observed around Dome C. |
author2 |
Sismologie (IPGS) (IPGS-Sismologie) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut de recherche en astrophysique et planétologie (IRAP) Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) CASE-IPY ANR-07-BLAN-0147,CASE-IPY,Concordia Antarctic Seismic Experiment (International Polar Year)(2007) |
format |
Article in Journal/Newspaper |
author |
Lévêque, Jean-Jacques Maggi, Alessia Souriau, Annie |
author_facet |
Lévêque, Jean-Jacques Maggi, Alessia Souriau, Annie |
author_sort |
Lévêque, Jean-Jacques |
title |
Seismological constraints on ice properties at Dome C, Antarctica, from H/V measurements. |
title_short |
Seismological constraints on ice properties at Dome C, Antarctica, from H/V measurements. |
title_full |
Seismological constraints on ice properties at Dome C, Antarctica, from H/V measurements. |
title_fullStr |
Seismological constraints on ice properties at Dome C, Antarctica, from H/V measurements. |
title_full_unstemmed |
Seismological constraints on ice properties at Dome C, Antarctica, from H/V measurements. |
title_sort |
seismological constraints on ice properties at dome c, antarctica, from h/v measurements. |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00679373 https://hal.science/hal-00679373/document https://hal.science/hal-00679373/file/LevequeEtal2010.pdf https://doi.org/10.1017/S0954102010000325 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Science Antarctica Ice cap |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica Ice cap |
op_source |
ISSN: 0954-1020 EISSN: 1365-2079 Antarctic Science https://hal.science/hal-00679373 Antarctic Science, 2010, 22 (5), pp.1-8. ⟨10.1017/S0954102010000325⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102010000325 hal-00679373 https://hal.science/hal-00679373 https://hal.science/hal-00679373/document https://hal.science/hal-00679373/file/LevequeEtal2010.pdf doi:10.1017/S0954102010000325 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1017/S0954102010000325 |
container_title |
Antarctic Science |
container_volume |
22 |
container_issue |
5 |
container_start_page |
572 |
op_container_end_page |
579 |
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1766266554619527168 |
spelling |
ftunivnantes:oai:HAL:hal-00679373v1 2023-05-15T13:58:19+02:00 Seismological constraints on ice properties at Dome C, Antarctica, from H/V measurements. Lévêque, Jean-Jacques Maggi, Alessia Souriau, Annie Sismologie (IPGS) (IPGS-Sismologie) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut de recherche en astrophysique et planétologie (IRAP) Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) CASE-IPY ANR-07-BLAN-0147,CASE-IPY,Concordia Antarctic Seismic Experiment (International Polar Year)(2007) 2010 https://hal.science/hal-00679373 https://hal.science/hal-00679373/document https://hal.science/hal-00679373/file/LevequeEtal2010.pdf https://doi.org/10.1017/S0954102010000325 en eng HAL CCSD Cambridge University Press (CUP) info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102010000325 hal-00679373 https://hal.science/hal-00679373 https://hal.science/hal-00679373/document https://hal.science/hal-00679373/file/LevequeEtal2010.pdf doi:10.1017/S0954102010000325 info:eu-repo/semantics/OpenAccess ISSN: 0954-1020 EISSN: 1365-2079 Antarctic Science https://hal.science/hal-00679373 Antarctic Science, 2010, 22 (5), pp.1-8. ⟨10.1017/S0954102010000325⟩ Antarctic seismological stations Concordia firn seismic ambient noise [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2010 ftunivnantes https://doi.org/10.1017/S0954102010000325 2023-02-22T00:12:32Z International audience The French-Italian Concordia (CCD) seismological station at Dome C is one of two observatories setup on the ice cap in the interior of the Antarctic continent. We analysed the seismic signal due to ambient noise at this station and at three temporary stations 5 km away from Concordia, in order to specify the ice properties beneath them. A method based on the horizontal to vertical (H/V) spectral ratio, commonly used to analyse soil response in seismic regions, was applied to the Antarctic stations. The main peak in the spectral ratios is observed at frequencies 6.7-8 Hz at the Dome C stations, but it is not observed at another station on the ice cap, QSPA, where the sensor is buried at 275m depth. This peak can be explained by a 23m thick unconsolidated snow or firn layer with a low S-wave velocity of 0.7kms-1, overlying a consolidated layer with S-wave velocity 1.8 km s-1. Despite the non-uniqueness of the solutions obtained by fitting the H/V spectra, this model is preferred because the depth of the velocity contrast coincides with the density at which ice particles arrange themselves in a continuous, dense lattice. A small variability of this structure is observed around Dome C. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica Ice cap Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic Antarctic Science 22 5 572 579 |