Long-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array.
The seismicity of the northern Mid-Atlantic Ridge was recorded by two hydrophone networks moored in the sound fixing and ranging (SOFAR) channel, on the flanks of the Mid-Atlantic Ridge, north and south of the Azores. During its period of operation (05/2002–09/2003), the northern ‘SIRENA' netwo...
Published in: | Geophysical Journal International |
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Online Access: | https://hal.science/hal-00112614 https://hal.science/hal-00112614/document https://hal.science/hal-00112614/file/162-2-516.pdf https://doi.org/10.1111/j.1365-246X.2005.02678.x |
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ftunivbrest:oai:HAL:hal-00112614v1 2023-06-11T04:14:50+02:00 Long-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array. Goslin, Jean Lourenco, N. Dziak, R. P. Bohnenstiehl, D.R. Haxel, J. Luis, J. 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) 2005-08 https://hal.science/hal-00112614 https://hal.science/hal-00112614/document https://hal.science/hal-00112614/file/162-2-516.pdf https://doi.org/10.1111/j.1365-246X.2005.02678.x en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2005.02678.x hal-00112614 https://hal.science/hal-00112614 https://hal.science/hal-00112614/document https://hal.science/hal-00112614/file/162-2-516.pdf doi:10.1111/j.1365-246X.2005.02678.x info:eu-repo/semantics/OpenAccess ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-00112614 Geophysical Journal International, 2005, 162 (2), pp.516-524. ⟨10.1111/j.1365-246X.2005.02678.x⟩ earthquake sequences long-term observations mid-ocean ridges seismicity [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2005 ftunivbrest https://doi.org/10.1111/j.1365-246X.2005.02678.x 2023-05-02T22:39:09Z The seismicity of the northern Mid-Atlantic Ridge was recorded by two hydrophone networks moored in the sound fixing and ranging (SOFAR) channel, on the flanks of the Mid-Atlantic Ridge, north and south of the Azores. During its period of operation (05/2002–09/2003), the northern ‘SIRENA' network, deployed between latitudes 40° 20′N and 50° 30′N, recorded acoustic signals generated by 809 earthquakes on the hotspot-influenced Reykjanes Ridge. This activity was distributed between five spatio-temporal event clusters, each initiated by a moderate-to-large magnitude (4.0–5.6 M) earthquake. The rate of earthquake occurrence within the initial portion of the largest sequence (which began on 2002 October 6) is described adequately by a modified Omori law aftershock model. Although this is consistent with triggering by tectonic processes, none of the Reykjanes Ridge sequences are dominated by a single large-magnitude earthquake, and they appear to be of relatively short duration (0.35–4.5 d) when compared to previously described mid-ocean ridge aftershock sequences. The occurrence of several near-equal magnitude events distributed throughout each sequence is inconsistent with the simple relaxation of mainshock-induced stresses and may reflect the involvement of magmatic or fluid processes along this deep (>2000 m) section of the Reykjanes Ridge. Article in Journal/Newspaper North Atlantic Université de Bretagne Occidentale: HAL Mid-Atlantic Ridge Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Geophysical Journal International 162 2 516 524 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
earthquake sequences long-term observations mid-ocean ridges seismicity [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
earthquake sequences long-term observations mid-ocean ridges seismicity [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Goslin, Jean Lourenco, N. Dziak, R. P. Bohnenstiehl, D.R. Haxel, J. Luis, J. Long-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array. |
topic_facet |
earthquake sequences long-term observations mid-ocean ridges seismicity [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
The seismicity of the northern Mid-Atlantic Ridge was recorded by two hydrophone networks moored in the sound fixing and ranging (SOFAR) channel, on the flanks of the Mid-Atlantic Ridge, north and south of the Azores. During its period of operation (05/2002–09/2003), the northern ‘SIRENA' network, deployed between latitudes 40° 20′N and 50° 30′N, recorded acoustic signals generated by 809 earthquakes on the hotspot-influenced Reykjanes Ridge. This activity was distributed between five spatio-temporal event clusters, each initiated by a moderate-to-large magnitude (4.0–5.6 M) earthquake. The rate of earthquake occurrence within the initial portion of the largest sequence (which began on 2002 October 6) is described adequately by a modified Omori law aftershock model. Although this is consistent with triggering by tectonic processes, none of the Reykjanes Ridge sequences are dominated by a single large-magnitude earthquake, and they appear to be of relatively short duration (0.35–4.5 d) when compared to previously described mid-ocean ridge aftershock sequences. The occurrence of several near-equal magnitude events distributed throughout each sequence is inconsistent with the simple relaxation of mainshock-induced stresses and may reflect the involvement of magmatic or fluid processes along this deep (>2000 m) section of the Reykjanes Ridge. |
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) |
format |
Article in Journal/Newspaper |
author |
Goslin, Jean Lourenco, N. Dziak, R. P. Bohnenstiehl, D.R. Haxel, J. Luis, J. |
author_facet |
Goslin, Jean Lourenco, N. Dziak, R. P. Bohnenstiehl, D.R. Haxel, J. Luis, J. |
author_sort |
Goslin, Jean |
title |
Long-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array. |
title_short |
Long-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array. |
title_full |
Long-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array. |
title_fullStr |
Long-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array. |
title_full_unstemmed |
Long-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array. |
title_sort |
long-term seismicity of the reykjanes ridge (north atlantic) recorded by a regional hydrophone array. |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00112614 https://hal.science/hal-00112614/document https://hal.science/hal-00112614/file/162-2-516.pdf https://doi.org/10.1111/j.1365-246X.2005.02678.x |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Mid-Atlantic Ridge Reykjanes |
geographic_facet |
Mid-Atlantic Ridge Reykjanes |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-00112614 Geophysical Journal International, 2005, 162 (2), pp.516-524. ⟨10.1111/j.1365-246X.2005.02678.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2005.02678.x hal-00112614 https://hal.science/hal-00112614 https://hal.science/hal-00112614/document https://hal.science/hal-00112614/file/162-2-516.pdf doi:10.1111/j.1365-246X.2005.02678.x |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/j.1365-246X.2005.02678.x |
container_title |
Geophysical Journal International |
container_volume |
162 |
container_issue |
2 |
container_start_page |
516 |
op_container_end_page |
524 |
_version_ |
1768371146904829952 |