{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,4,10]],"date-time":"2025-04-10T15:49:01Z","timestamp":1744300141178,"version":"3.33.0"},"posted":{"date-parts":[[2025,1,20]]},"group-title":"display","reference-count":0,"publisher":"Copernicus GmbH","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>The central islands of the Azores Archipelago in the North Atlantic straddle a diffuse zone of dextral transtension between the African and Eurasian plates, providing an ideal setting for studying the interplay between tectonics and magmatism. S&amp;#227;o Jorge is a narrow island dominated by a westward progression of past basaltic fissure eruptions, where fault zones act as volcanic rifts. After two inland eruptions with significant socioeconomic impact in 1580 and 1808, the most recent probable eruption occurred offshore in 1964, after two years of seismic activity. In March 2022, a seismic crisis began on S&amp;#227;o Jorge (magnitudes up to ML 3.8).&amp;#160;Our analyses of InSAR and GNSS data are consistent with a dike intrusion that stalled at 2 km depth below sea level. Here, we use seismicity to probe the space-time evolution of the intrusion. The unique geography and near-coastal position of seismicity yield inherently uncertain locations. To address this, we supplemented on-land stations with 6 ocean-bottom seismometers (OBSs) around the island later in the crisis. We use NLL-SSST-coherence, a location method ideal for changing station density, to exploit later OBS data to form robust source-specific station terms that allow precise relocation of the earlier part of the seismic sequence when coverage was sparser. In a final step, we combine waveform coherence and location uncertainty stacks to enhance hypocenter location precision to <\/jats:p>","DOI":"10.5194\/egusphere-egu24-14605","type":"posted-content","created":{"date-parts":[[2024,3,9]],"date-time":"2024-03-09T02:09:04Z","timestamp":1709950144000},"source":"Crossref","is-referenced-by-count":1,"title":["Growing an ocean island: high-precision seismicity reveals a multi-faceted magma intrusion during the 2022 S&amp;#227;o Jorge, Azores seismic crisis"],"prefix":"10.5194","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7476-3284","authenticated-orcid":false,"given":"Stephen P.","family":"Hicks","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1767-1164","authenticated-orcid":false,"given":"Pablo","family":"J. Gonzalez","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9733-284X","authenticated-orcid":false,"given":"Rui","family":"Fernandes","sequence":"additional","affiliation":[]},{"given":"Ana","family":"Ferreira","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2338-5535","authenticated-orcid":false,"given":"Ricardo","family":"Ramalho","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6483-2450","authenticated-orcid":false,"given":"Neil","family":"Mitchell","sequence":"additional","affiliation":[]},{"given":"Anthony","family":"Lomax","sequence":"additional","affiliation":[]},{"given":"Fernando","family":"Carrilho","sequence":"additional","affiliation":[]},{"given":"Susana","family":"Cust\u00f3dio","sequence":"additional","affiliation":[]},{"given":"Nuno Afonso","family":"Dias","sequence":"additional","affiliation":[]},{"given":"Jo\u00e3o","family":"Fontiela","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7362-8996","authenticated-orcid":false,"given":"Virgilio","family":"Mendes","sequence":"additional","affiliation":[]},{"given":"Arturo M.","family":"Garcia","sequence":"additional","affiliation":[]},{"given":"Augustin","family":"Marignier","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3633-7110","authenticated-orcid":false,"given":"Rui","family":"Marques","sequence":"additional","affiliation":[]},{"given":"Miguel","family":"Miranda","sequence":"additional","affiliation":[]},{"given":"Octavio","family":"Melo","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6954-387X","authenticated-orcid":false,"given":"Adriano","family":"Pimentel","sequence":"additional","affiliation":[]},{"given":"Gra\u00e7a","family":"Silveira","sequence":"additional","affiliation":[]},{"given":"Maria","family":"Tsekhmistrenko","sequence":"additional","affiliation":[]},{"name":"and the rest of the Sao Jorge investigation group","sequence":"additional","affiliation":[]}],"member":"3145","container-title":[],"original-title":[],"deposited":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T11:55:10Z","timestamp":1737374110000},"score":1,"resource":{"primary":{"URL":"https:\/\/meetingorganizer.copernicus.org\/EGU24\/EGU24-14605.html"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,1,20]]},"references-count":0,"URL":"https:\/\/doi.org\/10.5194\/egusphere-egu24-14605","relation":{},"subject":[],"published":{"date-parts":[[2025,1,20]]},"subtype":"other"}}