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Fault-mediated magma propagation and triggered seismicity revealed by the 2022 São Jorge Azores unrest

2026-04-23Artigo de investigação Acesso aberto
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authorProfile.emailbiblioteca@isel.pt
datacite.subject.fosCiências Naturais::Ciências Físicas
dc.contributor.authorHicks, Stephen P.
dc.contributor.authorGonzalez, Pablo J.
dc.contributor.authorLomax, Anthony
dc.contributor.authorFerreira, Ana M. G.
dc.contributor.authorRamalho, Ricardo S.
dc.contributor.authorMitchell, Neil C.
dc.contributor.authorSilveira, Graça
dc.contributor.authorDias, Nuno Afonso
dc.contributor.authorFontiela, João
dc.contributor.authorFernandes, Rui
dc.contributor.authorCustódio, Susana
dc.contributor.authorTsekhmistrenko, Maria
dc.contributor.authorMendes, Virgílio
dc.contributor.authorPimentel, Adriano
dc.contributor.authorSilva, Rita
dc.contributor.authorPrates, Gonçalo
dc.contributor.authorSturgeon, William
dc.contributor.authorMarignier, Augustin
dc.contributor.authorCarrilho, Fernando
dc.contributor.authorMarques, Rui
dc.contributor.authorMiranda, Miguel
dc.contributor.authorGarcia, Arturo M.
dc.date.accessioned2026-04-24T10:09:52Z
dc.date.available2026-04-24T10:09:52Z
dc.date.issued2026-04-23
dc.description.abstractAbstract Understanding failed volcanic eruptions is key to mapping magma plumbing and forecasting hazards. Faults and fractures guide magma, but their mechanisms remain unclear due to the lack of precise earthquake locations andlimited3-Dfaultmappinginvolcanicregions.The triple-junction setting of the Azores Archipelago, where volcanic systems and seismogenic faults coexist, offers a natural laboratory to study fault–magma interactions. We analysed ~18,000 earthquakes relocated to high precision using onshore and ocean-bottom seismometers, combined with geodetic data and seismic autocorrelation imaging, during a failed 2022 eruption on São Jorge Island. A magmatic dike ascended rapidly and mostly aseismically from the upper mantle, intruding a crustal fault before stalling ~1,600 m below the surface. Seismicity indicates that magma branching and lateral fluid escape along the fault triggered an intense, months-long swarm with rotated focal mechanisms. This study demonstrates the dual role of faults in facilitating and arresting magma ascent.eng
dc.identifier.citationHicks, S. P., Gonzalez, P. J., Lomax, A., Ferreira, A. M. G., Ramalho, R. S., Mitchell, N. C., Silveira, G., Dias, N. A., Fontiela, J., Fernandes, R., Custódio, S., Tsekhmistrenko, M., Mendes, V., Pimentel, A., Silva, R., Prates, G., Sturgeon, W., Marignier, A., Carrilho, F., Marques, R., Miranda, M., & Garcia, A. M. (2026). Fault-mediated magma propagation and triggered seismicity revealed by the 2022 São Jorge Azores unrest. Nature Communications, 17, 1-18. https://doi.org/10.1038/s41467-026-71668-6
dc.identifier.doi10.1038/s41467-026-71668-6
dc.identifier.issn2041-1723
dc.identifier.urihttp://hdl.handle.net/10400.21/22833
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationGEMMA - improving GEodynamic Models in MAcaronesia by reconciling geodetic, geophysical and geological data
dc.relationIntegRatEd tools to decipher the genesis and Spatio-TemporaL Evolution of Seismic Sequences.
dc.relationLA/P/0068/2020
dc.relationUID/50019/2025
dc.relationUID/PRR/50019/2025
dc.relationUID/PRR2/50019/2025
dc.relation.hasversionhttps://www.nature.com/articles/s41467-026-71668-6#citeas
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectFailed volcanic eruptions
dc.subjectMagma plumbing
dc.subjectForecasting hazards
dc.subjectEarthquakes
dc.subjectUID/50019/2025
dc.subjectUID/PRR/50019/2025
dc.subjectUID/PRR2/50019/2025
dc.titleFault-mediated magma propagation and triggered seismicity revealed by the 2022 São Jorge Azores unresteng
dc.typeresearch article
dspace.entity.typePublication
oaire.awardNumberPTDC/CTA-GEO/2083/2021
oaire.awardNumberPTDC/CTA-GEF/6674/2020
oaire.awardTitleGEMMA - improving GEodynamic Models in MAcaronesia by reconciling geodetic, geophysical and geological data
oaire.awardTitleIntegRatEd tools to decipher the genesis and Spatio-TemporaL Evolution of Seismic Sequences.
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTA-GEO%2F2083%2F2021/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTA-GEF%2F6674%2F2020/PT
oaire.citation.endPage18
oaire.citation.startPage1
oaire.citation.titleNature Communications
oaire.citation.volume17
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
oaire.versionhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43
person.familyNameSilveira
person.givenNameGraça
person.identifier91922
person.identifier.ciencia-id1116-1080-16F3
person.identifier.orcid0000-0002-2110-2554
person.identifier.ridA-3081-2009
person.identifier.scopus-author-id6602698071
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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