Automatic picking and probabilistic location for earthquake assessment in the Lesser Antilles subduction zone (1972–2012)
Instrumental catalogues of earthquakes in the subduction zone of the Lesser Antilles are produced by local observatories and the International Seismological Centre. But none of these catalogues merge all arrival times of the first regional phases available; in addition, they have a magnitude of comp...
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| Format: | Article |
| Language: | English |
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Académie des sciences
2021-10-01
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| Series: | Comptes Rendus. Géoscience |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.81/ |
| _version_ | 1797651307610243072 |
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| author | Massin, Frédérick Clouard, Valérie Vorobieva, Inessa Beauducel, François Saurel, Jean-Marie Satriano, Claudio Bouin, Marie-Paule Bertil, Didier |
| author_facet | Massin, Frédérick Clouard, Valérie Vorobieva, Inessa Beauducel, François Saurel, Jean-Marie Satriano, Claudio Bouin, Marie-Paule Bertil, Didier |
| author_sort | Massin, Frédérick |
| collection | DOAJ |
| description | Instrumental catalogues of earthquakes in the subduction zone of the Lesser Antilles are produced by local observatories and the International Seismological Centre. But none of these catalogues merge all arrival times of the first regional phases available; in addition, they have a magnitude of completeness relatively high for the entire Lesser Antilles area. As part of the Antilles Seismological Data Centre project, we produced a unified catalogue of known earthquakes from 1972 to 2012, with optimal constraints on the hypocentre locations. We re-evaluated the hypocentres with the method used in local observatories and a probabilistic method improving the distributions of arrival time residuals. We developed a simple method to select the preferred hypocentre independently of the localization algorithm, and we offer a complete catalogue including 46,703 earthquakes. Compared to other existing catalogues, we provide additional arrival times for 24,528 earthquakes. Our results highlight the variabilities of the magnitude of completeness and of the seismicity suggesting how the future analysis could infer the mechanisms of heterogeneous seismic coupling and intermediate-depth triggering. |
| first_indexed | 2024-03-11T16:14:08Z |
| format | Article |
| id | doaj.art-5443e66625c645c09205b2f3780b79f2 |
| institution | Directory Open Access Journal |
| issn | 1778-7025 |
| language | English |
| last_indexed | 2024-03-11T16:14:08Z |
| publishDate | 2021-10-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Géoscience |
| spelling | doaj.art-5443e66625c645c09205b2f3780b79f22023-10-24T14:24:12ZengAcadémie des sciencesComptes Rendus. Géoscience1778-70252021-10-01353S118720910.5802/crgeos.8110.5802/crgeos.81Automatic picking and probabilistic location for earthquake assessment in the Lesser Antilles subduction zone (1972–2012)Massin, Frédérick0https://orcid.org/0000-0002-7532-5139Clouard, Valérie1https://orcid.org/0000-0001-6701-9142Vorobieva, Inessa2https://orcid.org/0000-0003-1993-2433Beauducel, François3https://orcid.org/0000-0003-4803-6216Saurel, Jean-Marie4https://orcid.org/0000-0003-1458-4193Satriano, Claudio5https://orcid.org/0000-0002-3039-2530Bouin, Marie-Paule6https://orcid.org/0000-0001-7390-9299Bertil, Didier7https://orcid.org/0000-0002-6258-4043Eidgenössische Technische Hochschule (ETH), Swiss Seismological Service (SED), Zurich, SwitzerlandGéosciences Environnement Toulouse, Université de Toulouse, CNES, CNRS, IRD, UPS, Toulouse, FranceInstitute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences, Moscow, RussiaUniversité de Paris, Institut de Physique du Globe de Paris (IPGP), CNRS, Paris, FranceUniversité de Paris, Institut de Physique du Globe de Paris (IPGP), CNRS, Paris, FranceUniversité de Paris, Institut de Physique du Globe de Paris (IPGP), CNRS, Paris, FranceUniversité de Paris, Institut de Physique du Globe de Paris (IPGP), CNRS, Paris, FranceBureau de Recherches Géologiques et Minières (BRGM), Orléans, FranceInstrumental catalogues of earthquakes in the subduction zone of the Lesser Antilles are produced by local observatories and the International Seismological Centre. But none of these catalogues merge all arrival times of the first regional phases available; in addition, they have a magnitude of completeness relatively high for the entire Lesser Antilles area. As part of the Antilles Seismological Data Centre project, we produced a unified catalogue of known earthquakes from 1972 to 2012, with optimal constraints on the hypocentre locations. We re-evaluated the hypocentres with the method used in local observatories and a probabilistic method improving the distributions of arrival time residuals. We developed a simple method to select the preferred hypocentre independently of the localization algorithm, and we offer a complete catalogue including 46,703 earthquakes. Compared to other existing catalogues, we provide additional arrival times for 24,528 earthquakes. Our results highlight the variabilities of the magnitude of completeness and of the seismicity suggesting how the future analysis could infer the mechanisms of heterogeneous seismic coupling and intermediate-depth triggering.https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.81/Automatic phase arrival time pickingLesser AntillesEarthquakesMagnitude of completenessAbsolute hypocentre locationFirst phase arrival timeAutomatic phase arrival time picking |
| spellingShingle | Massin, Frédérick Clouard, Valérie Vorobieva, Inessa Beauducel, François Saurel, Jean-Marie Satriano, Claudio Bouin, Marie-Paule Bertil, Didier Automatic picking and probabilistic location for earthquake assessment in the Lesser Antilles subduction zone (1972–2012) Comptes Rendus. Géoscience Automatic phase arrival time picking Lesser Antilles Earthquakes Magnitude of completeness Absolute hypocentre location First phase arrival time Automatic phase arrival time picking |
| title | Automatic picking and probabilistic location for earthquake assessment in the Lesser Antilles subduction zone (1972–2012) |
| title_full | Automatic picking and probabilistic location for earthquake assessment in the Lesser Antilles subduction zone (1972–2012) |
| title_fullStr | Automatic picking and probabilistic location for earthquake assessment in the Lesser Antilles subduction zone (1972–2012) |
| title_full_unstemmed | Automatic picking and probabilistic location for earthquake assessment in the Lesser Antilles subduction zone (1972–2012) |
| title_short | Automatic picking and probabilistic location for earthquake assessment in the Lesser Antilles subduction zone (1972–2012) |
| title_sort | automatic picking and probabilistic location for earthquake assessment in the lesser antilles subduction zone 1972 2012 |
| topic | Automatic phase arrival time picking Lesser Antilles Earthquakes Magnitude of completeness Absolute hypocentre location First phase arrival time Automatic phase arrival time picking |
| url | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.81/ |
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