Automatic recognition of T and teleseismic P waves by statistical analysis of their spectra: An application to continuous records of moored hydrophones
International audience A network of moored hydrophones is an effective way of monitoring seismicity of oceanic ridges since it allows detection and localization of underwater events by recording generated T waves. The high cost of ship time necessitates long periods (normally a year) of autonomous f...
Published in: | Journal of Geophysical Research: Solid Earth |
---|---|
Main Authors: | , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2014
|
Subjects: | |
Online Access: | https://doi.org/10.1002/2013JB010936 https://hal-insu.archives-ouvertes.fr/insu-01058954/file/jgr-Sukowich.pdf https://hal-insu.archives-ouvertes.fr/insu-01058954 |
id |
fttriple:oai:gotriple.eu:10670/1.0yxz48 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Data analysis algorithms and implementation Data sets Neural networks fuzzy logic machine learning Ocean observatories and experiments Ocean observing systems geo envir |
spellingShingle |
Data analysis algorithms and implementation Data sets Neural networks fuzzy logic machine learning Ocean observatories and experiments Ocean observing systems geo envir Sukhovich, Alexey Irisson, Jean-Olivier Perrot, Julie Nolet, Guust Automatic recognition of T and teleseismic P waves by statistical analysis of their spectra: An application to continuous records of moored hydrophones |
topic_facet |
Data analysis algorithms and implementation Data sets Neural networks fuzzy logic machine learning Ocean observatories and experiments Ocean observing systems geo envir |
description |
International audience A network of moored hydrophones is an effective way of monitoring seismicity of oceanic ridges since it allows detection and localization of underwater events by recording generated T waves. The high cost of ship time necessitates long periods (normally a year) of autonomous functioning of the hydrophones, which results in very large data sets. The preliminary but indispensable part of the data analysis consists of identifying all T wave signals. This process is extremely time consuming if it is done by a human operator who visually examines the entire database. We propose a new method for automatic signal discrimination based on the Gradient Boosted Decision Trees technique that uses the distribution of signal spectral power among different frequency bands as the discriminating characteristic. We have applied this method to automatically identify the types of acoustic signals in data collected by two moored hydrophones in the North Atlantic. We show that the method is capable of efficiently resolving the signals of seismic origin with a small percentage of wrong identifications and missed events: 1.2% and 0.5% for T waves and 14.5% and 2.8% for teleseismic P waves, respectively. In addition, good identification rates for signals of other types (iceberg and ship generated) are obtained. Our results indicate that the method can be successfully applied to automate the analysis of other (not necessarily acoustic) databases provided that enough information is available to describe statistical properties of the signals to be identified. |
author2 |
Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Géoazur (GEOAZUR 6526) Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Nice Sophia Antipolis (. - 2019) (UNS) COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Sukhovich, Alexey Irisson, Jean-Olivier Perrot, Julie Nolet, Guust |
author_facet |
Sukhovich, Alexey Irisson, Jean-Olivier Perrot, Julie Nolet, Guust |
author_sort |
Sukhovich, Alexey |
title |
Automatic recognition of T and teleseismic P waves by statistical analysis of their spectra: An application to continuous records of moored hydrophones |
title_short |
Automatic recognition of T and teleseismic P waves by statistical analysis of their spectra: An application to continuous records of moored hydrophones |
title_full |
Automatic recognition of T and teleseismic P waves by statistical analysis of their spectra: An application to continuous records of moored hydrophones |
title_fullStr |
Automatic recognition of T and teleseismic P waves by statistical analysis of their spectra: An application to continuous records of moored hydrophones |
title_full_unstemmed |
Automatic recognition of T and teleseismic P waves by statistical analysis of their spectra: An application to continuous records of moored hydrophones |
title_sort |
automatic recognition of t and teleseismic p waves by statistical analysis of their spectra: an application to continuous records of moored hydrophones |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://doi.org/10.1002/2013JB010936 https://hal-insu.archives-ouvertes.fr/insu-01058954/file/jgr-Sukowich.pdf https://hal-insu.archives-ouvertes.fr/insu-01058954 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research Journal of Geophysical Research, American Geophysical Union, 2014, 119 (8), pp.6469-6485. ⟨10.1002/2013JB010936⟩ |
op_relation |
insu-01058954 doi:10.1002/2013JB010936 10670/1.0yxz48 https://hal-insu.archives-ouvertes.fr/insu-01058954/file/jgr-Sukowich.pdf https://hal-insu.archives-ouvertes.fr/insu-01058954 |
op_rights |
other |
op_doi |
https://doi.org/10.1002/2013JB010936 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
119 |
container_issue |
8 |
container_start_page |
6469 |
op_container_end_page |
6485 |
_version_ |
1766134636720685056 |
spelling |
fttriple:oai:gotriple.eu:10670/1.0yxz48 2023-05-15T17:35:28+02:00 Automatic recognition of T and teleseismic P waves by statistical analysis of their spectra: An application to continuous records of moored hydrophones Sukhovich, Alexey Irisson, Jean-Olivier Perrot, Julie Nolet, Guust Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Géoazur (GEOAZUR 6526) Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Nice Sophia Antipolis (. - 2019) (UNS) COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) 2014-07-31 https://doi.org/10.1002/2013JB010936 https://hal-insu.archives-ouvertes.fr/insu-01058954/file/jgr-Sukowich.pdf https://hal-insu.archives-ouvertes.fr/insu-01058954 en eng HAL CCSD American Geophysical Union insu-01058954 doi:10.1002/2013JB010936 10670/1.0yxz48 https://hal-insu.archives-ouvertes.fr/insu-01058954/file/jgr-Sukowich.pdf https://hal-insu.archives-ouvertes.fr/insu-01058954 other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research Journal of Geophysical Research, American Geophysical Union, 2014, 119 (8), pp.6469-6485. ⟨10.1002/2013JB010936⟩ Data analysis algorithms and implementation Data sets Neural networks fuzzy logic machine learning Ocean observatories and experiments Ocean observing systems geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.1002/2013JB010936 2023-01-22T18:47:11Z International audience A network of moored hydrophones is an effective way of monitoring seismicity of oceanic ridges since it allows detection and localization of underwater events by recording generated T waves. The high cost of ship time necessitates long periods (normally a year) of autonomous functioning of the hydrophones, which results in very large data sets. The preliminary but indispensable part of the data analysis consists of identifying all T wave signals. This process is extremely time consuming if it is done by a human operator who visually examines the entire database. We propose a new method for automatic signal discrimination based on the Gradient Boosted Decision Trees technique that uses the distribution of signal spectral power among different frequency bands as the discriminating characteristic. We have applied this method to automatically identify the types of acoustic signals in data collected by two moored hydrophones in the North Atlantic. We show that the method is capable of efficiently resolving the signals of seismic origin with a small percentage of wrong identifications and missed events: 1.2% and 0.5% for T waves and 14.5% and 2.8% for teleseismic P waves, respectively. In addition, good identification rates for signals of other types (iceberg and ship generated) are obtained. Our results indicate that the method can be successfully applied to automate the analysis of other (not necessarily acoustic) databases provided that enough information is available to describe statistical properties of the signals to be identified. Article in Journal/Newspaper North Atlantic Unknown Journal of Geophysical Research: Solid Earth 119 8 6469 6485 |