Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8997
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dc.contributor.authorallEmbriaco, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallMarinaro, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallFrugoni, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallMonna, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallEtiope, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallGasperini, L.; Istituto di Scienze Marine, Sezione Geologia Marina, CNR, Bologna, Italyen
dc.contributor.authorallPolonia, A.; Istituto di Scienze Marine, Sezione Geologia Marina, CNR, Bologna, Italyen
dc.contributor.authorallDel Bianco, F.; Istituto di Scienze Marine, Sezione Geologia Marina, CNR, Bologna, Italyen
dc.contributor.authorallCagatay, N.; Istanbul Technical University, Istanbul, Turkeyen
dc.contributor.authorallUlgen, U. B.; Istanbul Technical University, Istanbul, Turkeyen
dc.contributor.authorallFavali, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.date.accessioned2014-05-29T13:48:46Zen
dc.date.available2014-05-29T13:48:46Zen
dc.date.issued2014-02en
dc.identifier.urihttp://hdl.handle.net/2122/8997en
dc.description.abstractEpisodic gas seepage occurs at the seafloor in the Gulf of Izmit (Sea of Marmara, NW Turkey) along the submerged segment of the North Anatolian Fault (NAF), which ruptured during the 1999 Mw7.4 Izmit earthquake, and caused tectonic loading of the fault segment in front of the Istanbul metropolitan area. In order to study gas seepage and seismic energy release along the NAF, a multiparametric benthic observatory (SN-4) was deployed in the gulf at the western end of the 1999 Izmit earthquake rupture, and operated for about 1 yr at 166 m water depth. The SN-4 payload included a three-component broad-band seismometer, as well as gas and oceanographic sensors. We analysed data collected continuously for 161 d in the first part of the experiment, from 2009 October to 2010 March. The main objective of our work was to verify whether tectonic deformation along the NAF could trigger methane seepage. For this reason, we considered only local seismicity, that is, within 100 km from the station. No significant (ML ≥ 3.6) local earthquakes occurred during this period; on the other hand, the seismometer recorded high-frequency SDEs (short duration events), which are not related to seismicity but to abrupt increases of dissolved methane concentration in the sea water that we called MPEs (methane peak events). Acquisition of current velocity, dissolved oxygen, turbidity, temperature and salinity, allowed us to analyse the local oceanographic setting during each event, and correlate SDEs to episodic gas discharges from the seabed. We noted that MPEs are the result of such gas releases, but are detected only under favourable oceanographic conditions. This stresses the importance of collecting long-term multiparametric time-series to address complex phenomena such as gas and seismic energy release at the seafloor. Results from the SN-4 experiment in the Sea of Marmara suggest that neither low-magnitude local seismicity, nor regional events affect intensity and frequency of gas flows from the seafloor.en
dc.language.isoEnglishen
dc.publisher.nameWiley-Blackwellen
dc.relation.ispartofGeophysical Journal Internationalen
dc.relation.ispartofseries2/196(2014)en
dc.subjectTime-series analysisen
dc.subjectSeismicity and tectonicsen
dc.subjectBroad-band seismometersen
dc.subjectmultiparametric seafloor observatoryen
dc.subjectIzmit Gulfen
dc.subjectSea of Marmaraen
dc.subjectgas seepageen
dc.titleMonitoring of gas and seismic energy release by multiparametric benthic observatory along the North Anatolian Fault in the Sea of Marmara (NW Turkey)en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber850-866en
dc.identifier.URLhttp://gji.oxfordjournals.org/cgi/content/full/ggt436? ijkey=LNdzXmnnYopoUvB&keytype=refen
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gasesen
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.04. Marine geologyen
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistryen
dc.identifier.doi10.1093/gji/ggt436en
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dc.description.obiettivoSpecifico1T. Geodinamica e interno della Terraen
dc.description.obiettivoSpecifico3A. Ambiente Marinoen
dc.description.obiettivoSpecifico7A. Geofisica di esplorazioneen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.relation.issn0956-540Xen
dc.relation.eissn1365-246Xen
dc.contributor.authorEmbriaco, D.en
dc.contributor.authorMarinaro, G.en
dc.contributor.authorFrugoni, F.en
dc.contributor.authorMonna, S.en
dc.contributor.authorEtiope, G.en
dc.contributor.authorGasperini, L.en
dc.contributor.authorPolonia, A.en
dc.contributor.authorDel Bianco, F.en
dc.contributor.authorCagatay, N.en
dc.contributor.authorUlgen, U. B.en
dc.contributor.authorFavali, P.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto di Scienze Marine, Sezione Geologia Marina, CNR, Bologna, Italyen
dc.contributor.departmentIstituto di Scienze Marine, Sezione Geologia Marina, CNR, Bologna, Italyen
dc.contributor.departmentIstituto di Scienze Marine, Sezione Geologia Marina, CNR, Bologna, Italyen
dc.contributor.departmentIstanbul Technical University, Istanbul, Turkeyen
dc.contributor.departmentIstanbul Technical University, Istanbul, Turkeyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
item.openairetypearticle-
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crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptISMAR-CNR - Istituto di Scienze Marine-CNR, Bologna, Italy-
crisitem.author.deptCNR - ISMAR-
crisitem.author.deptCNR-Ismar Bologna-
crisitem.author.deptIstanbul Technical University (ITU), Istanbul, Turkey-
crisitem.author.deptIstanbul Technical University, Istanbul, Turkey-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.orcid0000-0001-7943-7341-
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crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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