{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T04:12:17Z","timestamp":1773979937104,"version":"3.50.1"},"posted":{"date-parts":[[2025,10,3]]},"group-title":"Earth Sciences","reference-count":0,"publisher":"California Digital Library (CDL)","license":[{"start":{"date-parts":[[2025,10,3]],"date-time":"2025-10-03T00:00:00Z","timestamp":1759449600000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"accepted":{"date-parts":[[2024,12,17]]},"abstract":"<jats:p>Understanding the signatures and mechanisms of failed volcanic eruptions is vital for mapping magma plumbing systems and forecasting volcanic events. Geological structures, such as faults and fractures, play a crucial role in guiding magma, but their mechanisms remain unclear due to the lack of 3-D mapping of faults in volcanic regions and sufficiently precise earthquake locations. The triple-junction setting of the Azores Archipelago, where volcanic systems and seismogenic crustal faults coexist, provides a unique insight into the interaction between faults and magma. Using ~18,000 earthquakes relocated to ultra-high precision with onshore and ocean-bottom seismometer data, along with geodetic observations and seismic autocorrelation imaging, we analyse a failed eruption in 2022 on S\u00e3o Jorge Island. A magmatic dike, likely originating in the upper mantle, ascended rapidly, largely aseismically, and without apparent precursory surface deformation, into a crustal fault, before stalling beneath the island edifice, 1,600 m below the surface. Adjacent seismicity suggests that the ascending magma stalled, probably due to minor melt branching and fluids escaping laterally along the fault zone, triggering an intense, months-long seismic swarm, comprising rotated focal mechanisms. Our study reveals the dual role of fault zones in both facilitating and arresting magma ascent, highlighting the interplay between tectonism and magmatism.<\/jats:p>","DOI":"10.31223\/x5ht4v","type":"posted-content","created":{"date-parts":[[2024,12,16]],"date-time":"2024-12-16T21:45:28Z","timestamp":1734385528000},"source":"Crossref","is-referenced-by-count":2,"title":["Faults modulate magma propagation and triggered seismicity: the 2022 S\u00e3o Jorge (Azores) volcanic unrest"],"prefix":"10.31223","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7476-3284","authenticated-orcid":false,"given":"Stephen","family":"Hicks","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1767-1164","authenticated-orcid":false,"given":"Pablo","family":"Gonz\u00e1lez","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7747-5990","authenticated-orcid":false,"given":"Anthony","family":"Lomax","sequence":"additional","affiliation":[]},{"given":"Ana","family":"Ferreira","sequence":"additional","affiliation":[]},{"given":"Ricardo","family":"Ramalho","sequence":"additional","affiliation":[]},{"given":"Neil","family":"Mitchell","sequence":"additional","affiliation":[]},{"given":"Gra\u00e7a","family":"Silveira","sequence":"additional","affiliation":[]},{"given":"Nuno","family":"Dias","sequence":"additional","affiliation":[]},{"given":"Joao","family":"Fontiela","sequence":"additional","affiliation":[]},{"given":"Rui","family":"Fernandes","sequence":"additional","affiliation":[]},{"given":"Susana","family":"Cust\u00f3dio","sequence":"additional","affiliation":[]},{"given":"Maria","family":"Tsekhmistrenko","sequence":"additional","affiliation":[]},{"given":"Virgilio","family":"Mendes","sequence":"additional","affiliation":[]},{"given":"Adriano","family":"Pimentel","sequence":"additional","affiliation":[]},{"given":"Rita","family":"Silva","sequence":"additional","affiliation":[]},{"given":"Gon\u00e7alo","family":"Prates","sequence":"additional","affiliation":[]},{"given":"William","family":"Sturgeon","sequence":"additional","affiliation":[]},{"given":"Augustin","family":"Marignier","sequence":"additional","affiliation":[]},{"given":"Fernando","family":"Carrilho","sequence":"additional","affiliation":[]},{"given":"Rui","family":"Marques","sequence":"additional","affiliation":[]},{"given":"Miguel","family":"Miranda","sequence":"additional","affiliation":[]},{"given":"Arturo","family":"Garcia","sequence":"additional","affiliation":[]}],"member":"29705","container-title":[],"original-title":[],"link":[{"URL":"https:\/\/eartharxiv.org\/repository\/object\/8224\/download\/19148\/","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,10,3]],"date-time":"2025-10-03T08:00:55Z","timestamp":1759478455000},"score":1,"resource":{"primary":{"URL":"https:\/\/eartharxiv.org\/repository\/view\/8224\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,10,3]]},"references-count":0,"URL":"https:\/\/doi.org\/10.31223\/x5ht4v","relation":{},"subject":[],"published":{"date-parts":[[2025,10,3]]},"subtype":"preprint"}}