Global scale analysis and modelling of primary microseisms
International audience Primary microseism is the less studied seismic background vibration of the Earth. Evidence points to sources caused by ocean gravity waves coupling with the seafloor topography. As a result, these sources should be in water depth smaller than the wavelength of ocean waves. Usi...
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ftinsu:oai:HAL:insu-03586638v1 2024-04-14T08:15:51+00:00 Global scale analysis and modelling of primary microseisms Gualtieri, L. Stutzmann, E. Juretzek, C. Hadziioannou, C. Ardhuin, F. Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2019 https://insu.hal.science/insu-03586638 https://insu.hal.science/insu-03586638/document https://insu.hal.science/insu-03586638/file/62990.pdf https://doi.org/10.1093/gji/ggz161 en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggz161 insu-03586638 https://insu.hal.science/insu-03586638 https://insu.hal.science/insu-03586638/document https://insu.hal.science/insu-03586638/file/62990.pdf BIBCODE: 2019GeoJI.218.560G doi:10.1093/gji/ggz161 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://insu.hal.science/insu-03586638 Geophysical Journal International, 2019, 218, pp.560-572. ⟨10.1093/gji/ggz161⟩ Numerical modelling Computational seismology Seismic noise Theoretical Seismology [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2019 ftinsu https://doi.org/10.1093/gji/ggz161 2024-03-21T17:16:00Z International audience Primary microseism is the less studied seismic background vibration of the Earth. Evidence points to sources caused by ocean gravity waves coupling with the seafloor topography. As a result, these sources should be in water depth smaller than the wavelength of ocean waves. Using a state-of-the-art ocean wave model, we carry out the first global-scale seismic modelling of the vertical-component power spectral density of primary microseisms. Our modelling allows us to infer that the observed weak seasonality of primary microseisms in the southern hemisphere corresponds to a weak local seasonality of the sources. Moreover, a systematic analysis of the source regions that mostly contribute to each station reveals that stations on both the east and west sides of the North Atlantic Ocean are sensitive to frequency-dependent source regions. At low frequency (i.e. 0.05 Hz), the dominant source regions can be located thousands of kilometres away from the stations. This observation suggests that identifying the source regions of primary microseisms at the closest coasts can be misleading. Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU Geophysical Journal International 218 1 560 572 |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Numerical modelling Computational seismology Seismic noise Theoretical Seismology [SDU]Sciences of the Universe [physics] |
spellingShingle |
Numerical modelling Computational seismology Seismic noise Theoretical Seismology [SDU]Sciences of the Universe [physics] Gualtieri, L. Stutzmann, E. Juretzek, C. Hadziioannou, C. Ardhuin, F. Global scale analysis and modelling of primary microseisms |
topic_facet |
Numerical modelling Computational seismology Seismic noise Theoretical Seismology [SDU]Sciences of the Universe [physics] |
description |
International audience Primary microseism is the less studied seismic background vibration of the Earth. Evidence points to sources caused by ocean gravity waves coupling with the seafloor topography. As a result, these sources should be in water depth smaller than the wavelength of ocean waves. Using a state-of-the-art ocean wave model, we carry out the first global-scale seismic modelling of the vertical-component power spectral density of primary microseisms. Our modelling allows us to infer that the observed weak seasonality of primary microseisms in the southern hemisphere corresponds to a weak local seasonality of the sources. Moreover, a systematic analysis of the source regions that mostly contribute to each station reveals that stations on both the east and west sides of the North Atlantic Ocean are sensitive to frequency-dependent source regions. At low frequency (i.e. 0.05 Hz), the dominant source regions can be located thousands of kilometres away from the stations. This observation suggests that identifying the source regions of primary microseisms at the closest coasts can be misleading. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Gualtieri, L. Stutzmann, E. Juretzek, C. Hadziioannou, C. Ardhuin, F. |
author_facet |
Gualtieri, L. Stutzmann, E. Juretzek, C. Hadziioannou, C. Ardhuin, F. |
author_sort |
Gualtieri, L. |
title |
Global scale analysis and modelling of primary microseisms |
title_short |
Global scale analysis and modelling of primary microseisms |
title_full |
Global scale analysis and modelling of primary microseisms |
title_fullStr |
Global scale analysis and modelling of primary microseisms |
title_full_unstemmed |
Global scale analysis and modelling of primary microseisms |
title_sort |
global scale analysis and modelling of primary microseisms |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://insu.hal.science/insu-03586638 https://insu.hal.science/insu-03586638/document https://insu.hal.science/insu-03586638/file/62990.pdf https://doi.org/10.1093/gji/ggz161 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://insu.hal.science/insu-03586638 Geophysical Journal International, 2019, 218, pp.560-572. ⟨10.1093/gji/ggz161⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggz161 insu-03586638 https://insu.hal.science/insu-03586638 https://insu.hal.science/insu-03586638/document https://insu.hal.science/insu-03586638/file/62990.pdf BIBCODE: 2019GeoJI.218.560G doi:10.1093/gji/ggz161 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1093/gji/ggz161 |
container_title |
Geophysical Journal International |
container_volume |
218 |
container_issue |
1 |
container_start_page |
560 |
op_container_end_page |
572 |
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1796314331952971776 |