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Long-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array

2005-08Journal article Open access
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dc.contributor.authorGoslin, J.
dc.contributor.authorLourenço, Nuno
dc.contributor.authorDziak, R. P.
dc.contributor.authorBohnenstiehl, D. R.
dc.contributor.authorHaxel, J.
dc.contributor.authorLuis, Joaquim
dc.date.accessioned2018-12-07T14:52:43Z
dc.date.available2018-12-07T14:52:43Z
dc.date.issued2005-08
dc.description.abstractThe 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 degrees 20'N and 50 degrees 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 main shock-induced stresses and may reflect the involvement of magmatic or fluid processes along this deep (>2000 m) section of the Reykjanes Ridge.
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1111/j.1365-246X.2005.02678.x
dc.identifier.issn0956-540X
dc.identifier.urihttp://hdl.handle.net/10400.1/11175
dc.language.isoeng
dc.peerreviewedyes
dc.publisherOxford University Press
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectEarthquake swarms
dc.subjectOmori formula
dc.subjectTectonics
dc.subjectIceland
dc.subjectModel
dc.subjectLaw
dc.titleLong-term seismicity of the Reykjanes Ridge (North Atlantic) recorded by a regional hydrophone array
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage524
oaire.citation.issue2
oaire.citation.startPage516
oaire.citation.titleGeophysical Journal International
oaire.citation.volume162
person.familyNameLourenço
person.familyNameLuis
person.givenNameNuno
person.givenNameJoaquim
person.identifier.ciencia-id4A13-CD1F-7BEE
person.identifier.ciencia-id0D11-8EF9-2E68
person.identifier.orcid0000-0002-8038-677X
person.identifier.orcid0000-0002-9035-4069
person.identifier.ridA-5361-2013
person.identifier.ridA-1112-2009
person.identifier.scopus-author-id57216555279
person.identifier.scopus-author-id7006391353
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication0e5f36bb-a904-41d3-8bd9-8acd132dc808
relation.isAuthorOfPublication636a16a1-f50a-49d2-9d5c-dbc3444815bd
relation.isAuthorOfPublication.latestForDiscovery0e5f36bb-a904-41d3-8bd9-8acd132dc808

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