Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise

<p<Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin. We present results based on a 1-year-long broad-band deployment covering a large part of the eastern Py...
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Autor*in:	J. Díaz [verfasserIn] S. Ventosa [verfasserIn] M. Schimmel [verfasserIn] M. Ruiz [verfasserIn] A. Macau [verfasserIn] A. Gabàs [verfasserIn] D. Martí [verfasserIn] Ö. Akin [verfasserIn] J. Vergés [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Übergeordnetes Werk:	In: Solid Earth - Copernicus Publications, 2011, 14(2023), Seite 499-514
Übergeordnetes Werk:	volume:14 ; year:2023 ; pages:499-514

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.5194/se-14-499-2023

Katalog-ID:	DOAJ090035399

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allfields	10.5194/se-14-499-2023 doi (DE-627)DOAJ090035399 (DE-599)DOAJ878096a0120745bb8ce2354a299e366f DE-627 ger DE-627 rakwb eng QE1-996.5 QE640-699 J. Díaz verfasserin aut Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin. We present results based on a 1-year-long broad-band deployment covering a large part of the eastern Pyrenees and a 2-month-long high-density deployment covering the basin with interstation distances around 1.5 km. The explored techniques include autocorrelations, ambient noise Rayleigh wave tomography, horizontal-to-vertical-spectra ratio (HVSR) and band-pass-filtered ambient noise amplitude mapping. The basement depth estimations retrieved from each of these approaches, based on independent datasets and different implicit assumptions, are consistent, showing that the deeper part of the basin is located in its central part, reaching depths of 600–700 m close to the Têt fault trace bounding the Cerdanya Basin to the NE. The overall consistency between the results from all the methodologies provides solid constraints to our basement depth estimation, although significant differences arise in some areas. The results also show that, when high-density seismic data are available, HVSR and ambient noise amplitude analysis in a selected frequency band are useful tools to quickly map the sedimentary 3D geometry. Beside this methodological aspect, our results help to improve the geological characterization of the Cerdanya Basin and will provide further constraints to refine the seismic risk maps of an area of relevant touristic and economic activity.</p< Geology Stratigraphy S. Ventosa verfasserin aut M. Schimmel verfasserin aut M. Ruiz verfasserin aut A. Macau verfasserin aut A. Gabàs verfasserin aut D. Martí verfasserin aut Ö. Akin verfasserin aut Ö. Akin verfasserin aut J. Vergés verfasserin aut In Solid Earth Copernicus Publications, 2011 14(2023), Seite 499-514 (DE-627)62317720X (DE-600)2545676-3 18699529 nnns volume:14 year:2023 pages:499-514 https://doi.org/10.5194/se-14-499-2023 kostenfrei https://doaj.org/article/878096a0120745bb8ce2354a299e366f kostenfrei https://se.copernicus.org/articles/14/499/2023/se-14-499-2023.pdf kostenfrei https://doaj.org/toc/1869-9510 Journal toc kostenfrei https://doaj.org/toc/1869-9529 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2023 499-514
spelling	10.5194/se-14-499-2023 doi (DE-627)DOAJ090035399 (DE-599)DOAJ878096a0120745bb8ce2354a299e366f DE-627 ger DE-627 rakwb eng QE1-996.5 QE640-699 J. Díaz verfasserin aut Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin. We present results based on a 1-year-long broad-band deployment covering a large part of the eastern Pyrenees and a 2-month-long high-density deployment covering the basin with interstation distances around 1.5 km. The explored techniques include autocorrelations, ambient noise Rayleigh wave tomography, horizontal-to-vertical-spectra ratio (HVSR) and band-pass-filtered ambient noise amplitude mapping. The basement depth estimations retrieved from each of these approaches, based on independent datasets and different implicit assumptions, are consistent, showing that the deeper part of the basin is located in its central part, reaching depths of 600–700 m close to the Têt fault trace bounding the Cerdanya Basin to the NE. The overall consistency between the results from all the methodologies provides solid constraints to our basement depth estimation, although significant differences arise in some areas. The results also show that, when high-density seismic data are available, HVSR and ambient noise amplitude analysis in a selected frequency band are useful tools to quickly map the sedimentary 3D geometry. Beside this methodological aspect, our results help to improve the geological characterization of the Cerdanya Basin and will provide further constraints to refine the seismic risk maps of an area of relevant touristic and economic activity.</p< Geology Stratigraphy S. Ventosa verfasserin aut M. Schimmel verfasserin aut M. Ruiz verfasserin aut A. Macau verfasserin aut A. Gabàs verfasserin aut D. Martí verfasserin aut Ö. Akin verfasserin aut Ö. Akin verfasserin aut J. Vergés verfasserin aut In Solid Earth Copernicus Publications, 2011 14(2023), Seite 499-514 (DE-627)62317720X (DE-600)2545676-3 18699529 nnns volume:14 year:2023 pages:499-514 https://doi.org/10.5194/se-14-499-2023 kostenfrei https://doaj.org/article/878096a0120745bb8ce2354a299e366f kostenfrei https://se.copernicus.org/articles/14/499/2023/se-14-499-2023.pdf kostenfrei https://doaj.org/toc/1869-9510 Journal toc kostenfrei https://doaj.org/toc/1869-9529 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2023 499-514
allfields_unstemmed	10.5194/se-14-499-2023 doi (DE-627)DOAJ090035399 (DE-599)DOAJ878096a0120745bb8ce2354a299e366f DE-627 ger DE-627 rakwb eng QE1-996.5 QE640-699 J. Díaz verfasserin aut Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin. We present results based on a 1-year-long broad-band deployment covering a large part of the eastern Pyrenees and a 2-month-long high-density deployment covering the basin with interstation distances around 1.5 km. The explored techniques include autocorrelations, ambient noise Rayleigh wave tomography, horizontal-to-vertical-spectra ratio (HVSR) and band-pass-filtered ambient noise amplitude mapping. The basement depth estimations retrieved from each of these approaches, based on independent datasets and different implicit assumptions, are consistent, showing that the deeper part of the basin is located in its central part, reaching depths of 600–700 m close to the Têt fault trace bounding the Cerdanya Basin to the NE. The overall consistency between the results from all the methodologies provides solid constraints to our basement depth estimation, although significant differences arise in some areas. The results also show that, when high-density seismic data are available, HVSR and ambient noise amplitude analysis in a selected frequency band are useful tools to quickly map the sedimentary 3D geometry. Beside this methodological aspect, our results help to improve the geological characterization of the Cerdanya Basin and will provide further constraints to refine the seismic risk maps of an area of relevant touristic and economic activity.</p< Geology Stratigraphy S. Ventosa verfasserin aut M. Schimmel verfasserin aut M. Ruiz verfasserin aut A. Macau verfasserin aut A. Gabàs verfasserin aut D. Martí verfasserin aut Ö. Akin verfasserin aut Ö. Akin verfasserin aut J. Vergés verfasserin aut In Solid Earth Copernicus Publications, 2011 14(2023), Seite 499-514 (DE-627)62317720X (DE-600)2545676-3 18699529 nnns volume:14 year:2023 pages:499-514 https://doi.org/10.5194/se-14-499-2023 kostenfrei https://doaj.org/article/878096a0120745bb8ce2354a299e366f kostenfrei https://se.copernicus.org/articles/14/499/2023/se-14-499-2023.pdf kostenfrei https://doaj.org/toc/1869-9510 Journal toc kostenfrei https://doaj.org/toc/1869-9529 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2023 499-514
allfieldsGer	10.5194/se-14-499-2023 doi (DE-627)DOAJ090035399 (DE-599)DOAJ878096a0120745bb8ce2354a299e366f DE-627 ger DE-627 rakwb eng QE1-996.5 QE640-699 J. Díaz verfasserin aut Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin. We present results based on a 1-year-long broad-band deployment covering a large part of the eastern Pyrenees and a 2-month-long high-density deployment covering the basin with interstation distances around 1.5 km. The explored techniques include autocorrelations, ambient noise Rayleigh wave tomography, horizontal-to-vertical-spectra ratio (HVSR) and band-pass-filtered ambient noise amplitude mapping. The basement depth estimations retrieved from each of these approaches, based on independent datasets and different implicit assumptions, are consistent, showing that the deeper part of the basin is located in its central part, reaching depths of 600–700 m close to the Têt fault trace bounding the Cerdanya Basin to the NE. The overall consistency between the results from all the methodologies provides solid constraints to our basement depth estimation, although significant differences arise in some areas. The results also show that, when high-density seismic data are available, HVSR and ambient noise amplitude analysis in a selected frequency band are useful tools to quickly map the sedimentary 3D geometry. Beside this methodological aspect, our results help to improve the geological characterization of the Cerdanya Basin and will provide further constraints to refine the seismic risk maps of an area of relevant touristic and economic activity.</p< Geology Stratigraphy S. Ventosa verfasserin aut M. Schimmel verfasserin aut M. Ruiz verfasserin aut A. Macau verfasserin aut A. Gabàs verfasserin aut D. Martí verfasserin aut Ö. Akin verfasserin aut Ö. Akin verfasserin aut J. Vergés verfasserin aut In Solid Earth Copernicus Publications, 2011 14(2023), Seite 499-514 (DE-627)62317720X (DE-600)2545676-3 18699529 nnns volume:14 year:2023 pages:499-514 https://doi.org/10.5194/se-14-499-2023 kostenfrei https://doaj.org/article/878096a0120745bb8ce2354a299e366f kostenfrei https://se.copernicus.org/articles/14/499/2023/se-14-499-2023.pdf kostenfrei https://doaj.org/toc/1869-9510 Journal toc kostenfrei https://doaj.org/toc/1869-9529 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2023 499-514
allfieldsSound	10.5194/se-14-499-2023 doi (DE-627)DOAJ090035399 (DE-599)DOAJ878096a0120745bb8ce2354a299e366f DE-627 ger DE-627 rakwb eng QE1-996.5 QE640-699 J. Díaz verfasserin aut Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin. We present results based on a 1-year-long broad-band deployment covering a large part of the eastern Pyrenees and a 2-month-long high-density deployment covering the basin with interstation distances around 1.5 km. The explored techniques include autocorrelations, ambient noise Rayleigh wave tomography, horizontal-to-vertical-spectra ratio (HVSR) and band-pass-filtered ambient noise amplitude mapping. The basement depth estimations retrieved from each of these approaches, based on independent datasets and different implicit assumptions, are consistent, showing that the deeper part of the basin is located in its central part, reaching depths of 600–700 m close to the Têt fault trace bounding the Cerdanya Basin to the NE. The overall consistency between the results from all the methodologies provides solid constraints to our basement depth estimation, although significant differences arise in some areas. The results also show that, when high-density seismic data are available, HVSR and ambient noise amplitude analysis in a selected frequency band are useful tools to quickly map the sedimentary 3D geometry. Beside this methodological aspect, our results help to improve the geological characterization of the Cerdanya Basin and will provide further constraints to refine the seismic risk maps of an area of relevant touristic and economic activity.</p< Geology Stratigraphy S. Ventosa verfasserin aut M. Schimmel verfasserin aut M. Ruiz verfasserin aut A. Macau verfasserin aut A. Gabàs verfasserin aut D. Martí verfasserin aut Ö. Akin verfasserin aut Ö. Akin verfasserin aut J. Vergés verfasserin aut In Solid Earth Copernicus Publications, 2011 14(2023), Seite 499-514 (DE-627)62317720X (DE-600)2545676-3 18699529 nnns volume:14 year:2023 pages:499-514 https://doi.org/10.5194/se-14-499-2023 kostenfrei https://doaj.org/article/878096a0120745bb8ce2354a299e366f kostenfrei https://se.copernicus.org/articles/14/499/2023/se-14-499-2023.pdf kostenfrei https://doaj.org/toc/1869-9510 Journal toc kostenfrei https://doaj.org/toc/1869-9529 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2023 499-514
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authorswithroles_txt_mv	J. Díaz @@aut@@ S. Ventosa @@aut@@ M. Schimmel @@aut@@ M. Ruiz @@aut@@ A. Macau @@aut@@ A. Gabàs @@aut@@ D. Martí @@aut@@ Ö. Akin @@aut@@ J. Vergés @@aut@@
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author	J. Díaz
spellingShingle	J. Díaz misc QE1-996.5 misc QE640-699 misc Geology misc Stratigraphy Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise
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topic_title	QE1-996.5 QE640-699 Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise
topic	misc QE1-996.5 misc QE640-699 misc Geology misc Stratigraphy
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title	Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise
ctrlnum	(DE-627)DOAJ090035399 (DE-599)DOAJ878096a0120745bb8ce2354a299e366f
title_full	Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise
author_sort	J. Díaz
journal	Solid Earth
journalStr	Solid Earth
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author_browse	J. Díaz S. Ventosa M. Schimmel M. Ruiz A. Macau A. Gabàs D. Martí Ö. Akin J. Vergés
container_volume	14
class	QE1-996.5 QE640-699
format_se	Elektronische Aufsätze
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doi_str_mv	10.5194/se-14-499-2023
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title_sort	mapping the basement of the cerdanya basin (eastern pyrenees) using seismic ambient noise
callnumber	QE1-996.5
title_auth	Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise
abstract	<p<Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin. We present results based on a 1-year-long broad-band deployment covering a large part of the eastern Pyrenees and a 2-month-long high-density deployment covering the basin with interstation distances around 1.5 km. The explored techniques include autocorrelations, ambient noise Rayleigh wave tomography, horizontal-to-vertical-spectra ratio (HVSR) and band-pass-filtered ambient noise amplitude mapping. The basement depth estimations retrieved from each of these approaches, based on independent datasets and different implicit assumptions, are consistent, showing that the deeper part of the basin is located in its central part, reaching depths of 600–700 m close to the Têt fault trace bounding the Cerdanya Basin to the NE. The overall consistency between the results from all the methodologies provides solid constraints to our basement depth estimation, although significant differences arise in some areas. The results also show that, when high-density seismic data are available, HVSR and ambient noise amplitude analysis in a selected frequency band are useful tools to quickly map the sedimentary 3D geometry. Beside this methodological aspect, our results help to improve the geological characterization of the Cerdanya Basin and will provide further constraints to refine the seismic risk maps of an area of relevant touristic and economic activity.</p<
abstractGer	<p<Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin. We present results based on a 1-year-long broad-band deployment covering a large part of the eastern Pyrenees and a 2-month-long high-density deployment covering the basin with interstation distances around 1.5 km. The explored techniques include autocorrelations, ambient noise Rayleigh wave tomography, horizontal-to-vertical-spectra ratio (HVSR) and band-pass-filtered ambient noise amplitude mapping. The basement depth estimations retrieved from each of these approaches, based on independent datasets and different implicit assumptions, are consistent, showing that the deeper part of the basin is located in its central part, reaching depths of 600–700 m close to the Têt fault trace bounding the Cerdanya Basin to the NE. The overall consistency between the results from all the methodologies provides solid constraints to our basement depth estimation, although significant differences arise in some areas. The results also show that, when high-density seismic data are available, HVSR and ambient noise amplitude analysis in a selected frequency band are useful tools to quickly map the sedimentary 3D geometry. Beside this methodological aspect, our results help to improve the geological characterization of the Cerdanya Basin and will provide further constraints to refine the seismic risk maps of an area of relevant touristic and economic activity.</p<
abstract_unstemmed	<p<Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin. We present results based on a 1-year-long broad-band deployment covering a large part of the eastern Pyrenees and a 2-month-long high-density deployment covering the basin with interstation distances around 1.5 km. The explored techniques include autocorrelations, ambient noise Rayleigh wave tomography, horizontal-to-vertical-spectra ratio (HVSR) and band-pass-filtered ambient noise amplitude mapping. The basement depth estimations retrieved from each of these approaches, based on independent datasets and different implicit assumptions, are consistent, showing that the deeper part of the basin is located in its central part, reaching depths of 600–700 m close to the Têt fault trace bounding the Cerdanya Basin to the NE. The overall consistency between the results from all the methodologies provides solid constraints to our basement depth estimation, although significant differences arise in some areas. The results also show that, when high-density seismic data are available, HVSR and ambient noise amplitude analysis in a selected frequency band are useful tools to quickly map the sedimentary 3D geometry. Beside this methodological aspect, our results help to improve the geological characterization of the Cerdanya Basin and will provide further constraints to refine the seismic risk maps of an area of relevant touristic and economic activity.</p<
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title_short	Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise
url	https://doi.org/10.5194/se-14-499-2023 https://doaj.org/article/878096a0120745bb8ce2354a299e366f https://se.copernicus.org/articles/14/499/2023/se-14-499-2023.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529
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author2	S. Ventosa M. Schimmel M. Ruiz A. Macau A. Gabàs D. Martí Ö. Akin J. Vergés
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up_date	2024-07-04T01:39:21.369Z
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