Globally Scattered 2011 Tohoku Tsunami Waves From a Seafloor Sensor Array in the Northeast Pacific Ocean
International audience Modeling of tsunami wave propagation for forecasting focuses on the arrival time and amplitude of the earliest tsunami waves reaching coastlines. The complex later tsunami wavefield, in which scattering is predominant, poses additional hazards due to possible constructive inte...
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Online Access: | https://hal.science/hal-03578392 https://hal.science/hal-03578392/document https://hal.science/hal-03578392/file/2020JB020221.pdf https://doi.org/10.1029/2020JB020221 |
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ftinsu:oai:HAL:hal-03578392v1 2023-10-09T21:46:51+02:00 Globally Scattered 2011 Tohoku Tsunami Waves From a Seafloor Sensor Array in the Northeast Pacific Ocean Kohler, Monica Bowden, Daniel Ampuero, Jean‐paul Shi, Jian Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) 2020-11 https://hal.science/hal-03578392 https://hal.science/hal-03578392/document https://hal.science/hal-03578392/file/2020JB020221.pdf https://doi.org/10.1029/2020JB020221 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2020JB020221 hal-03578392 https://hal.science/hal-03578392 https://hal.science/hal-03578392/document https://hal.science/hal-03578392/file/2020JB020221.pdf doi:10.1029/2020JB020221 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://hal.science/hal-03578392 Journal of Geophysical Research : Solid Earth, 2020, 125 (11), pp.e2020JB020221. ⟨10.1029/2020JB020221⟩ [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2020 ftinsu https://doi.org/10.1029/2020JB020221 2023-09-13T16:26:33Z International audience Modeling of tsunami wave propagation for forecasting focuses on the arrival time and amplitude of the earliest tsunami waves reaching coastlines. The complex later tsunami wavefield, in which scattering is predominant, poses additional hazards due to possible constructive interference of coherent packets of wave energy. However, almost no data sets exist to characterize the geographical sources and temporal evolution of the scattered waves. Here we show how recordings of the 2011 Tohoku tsunami by an array of pressure gauge sensors in the northeastern Pacific Ocean reveal coherent waves that are produced by scattering from distant coastlines including South America and Antarctica, as well as multiple seafloor fracture zones, ridges, and island chains. Multiple signal classification analysis and backward propagation ray tracing provide tight constraints on the origin of each scattered phase and resolve simultaneous wave arrivals from different scatterers. Incoming waves from constant back azimuths occur over time durations of several hours, revealing the time persistence of specific geographical scatterers. The results can advance numerical predictions of tsunami wave impact because they provide direct evidence for the necessity of incorporating both local and distant bathymetry over a range of length scales and for long time durations, to account for the azimuthal dependence of scatterer strength. Article in Journal/Newspaper Antarc* Antarctica Institut national des sciences de l'Univers: HAL-INSU Pacific Journal of Geophysical Research: Solid Earth 125 11 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Kohler, Monica Bowden, Daniel Ampuero, Jean‐paul Shi, Jian Globally Scattered 2011 Tohoku Tsunami Waves From a Seafloor Sensor Array in the Northeast Pacific Ocean |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Modeling of tsunami wave propagation for forecasting focuses on the arrival time and amplitude of the earliest tsunami waves reaching coastlines. The complex later tsunami wavefield, in which scattering is predominant, poses additional hazards due to possible constructive interference of coherent packets of wave energy. However, almost no data sets exist to characterize the geographical sources and temporal evolution of the scattered waves. Here we show how recordings of the 2011 Tohoku tsunami by an array of pressure gauge sensors in the northeastern Pacific Ocean reveal coherent waves that are produced by scattering from distant coastlines including South America and Antarctica, as well as multiple seafloor fracture zones, ridges, and island chains. Multiple signal classification analysis and backward propagation ray tracing provide tight constraints on the origin of each scattered phase and resolve simultaneous wave arrivals from different scatterers. Incoming waves from constant back azimuths occur over time durations of several hours, revealing the time persistence of specific geographical scatterers. The results can advance numerical predictions of tsunami wave impact because they provide direct evidence for the necessity of incorporating both local and distant bathymetry over a range of length scales and for long time durations, to account for the azimuthal dependence of scatterer strength. |
author2 |
Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) |
format |
Article in Journal/Newspaper |
author |
Kohler, Monica Bowden, Daniel Ampuero, Jean‐paul Shi, Jian |
author_facet |
Kohler, Monica Bowden, Daniel Ampuero, Jean‐paul Shi, Jian |
author_sort |
Kohler, Monica |
title |
Globally Scattered 2011 Tohoku Tsunami Waves From a Seafloor Sensor Array in the Northeast Pacific Ocean |
title_short |
Globally Scattered 2011 Tohoku Tsunami Waves From a Seafloor Sensor Array in the Northeast Pacific Ocean |
title_full |
Globally Scattered 2011 Tohoku Tsunami Waves From a Seafloor Sensor Array in the Northeast Pacific Ocean |
title_fullStr |
Globally Scattered 2011 Tohoku Tsunami Waves From a Seafloor Sensor Array in the Northeast Pacific Ocean |
title_full_unstemmed |
Globally Scattered 2011 Tohoku Tsunami Waves From a Seafloor Sensor Array in the Northeast Pacific Ocean |
title_sort |
globally scattered 2011 tohoku tsunami waves from a seafloor sensor array in the northeast pacific ocean |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03578392 https://hal.science/hal-03578392/document https://hal.science/hal-03578392/file/2020JB020221.pdf https://doi.org/10.1029/2020JB020221 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://hal.science/hal-03578392 Journal of Geophysical Research : Solid Earth, 2020, 125 (11), pp.e2020JB020221. ⟨10.1029/2020JB020221⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020JB020221 hal-03578392 https://hal.science/hal-03578392 https://hal.science/hal-03578392/document https://hal.science/hal-03578392/file/2020JB020221.pdf doi:10.1029/2020JB020221 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2020JB020221 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
125 |
container_issue |
11 |
_version_ |
1779309407524356096 |