20.500.12556/DiRROS-17762 Outgassing behaviour during highly explosive basaltic eruptions Explosivity of basaltic eruptions is related to the efficiency in which exsolved gas can separate from the melt during ascent, which is controlled by magma permeability. However, basaltic pyroclasts from eruptions of varying explosivity can show similar permeability, indicating a possible complex relationship between permeability, outgassing and eruptive style. Here, we provide 3D measurements of basaltic pyroclasts using X-ray microtomography. We investigate the role of permeability and outgassing on magma ascent dynamics by using a numerical conduit model. Among the permeable parameters, bubble number density and friction coefficient largely affect explosivity. However, for fast ascending basaltic magmas, gas-melt coupling is maintained independent of magma permeability. In this case, magma storage conditions may determine eruptive style, driving rapid magma ascent, crystallisation and bubble nucleation, producing a highly explosive eruption. Monitoring parameters which reveal pre-eruptive conditions may assist hazard mitigation, particularly for basaltic systems which exhibit a wide range in eruptive style. natural hazards petrology volcanology naravne nevarnosti petrologija vulkanologija true false true London Springer Nature Angleški jezik Slovenski jezik © The Author(s) 2024 Neznano 2024-01-12 08:11:06 2024-01-12 08:30:49 2024-01-31 03:39:15 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 10.1. 2024; str. 1-16 article no. 3 Vol. 5 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-01-02 55 2662-4435 10.1038/s43247-023-01182-w 180385795 RAZ_Bamber_Emily_C._2024.pdf RAZ_Bamber_Emily_C._2024.pdf 1 975C8DD113EB6240DBFFC3A83F1BE274 499f65b38b030c56a19bc4c8639aedc624cf6a5779edd04bbb7eaca1d22078a6 3dbad43b-b11c-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24114 https://doi.org/10.1038/s43247-023-01182-w 0 2db609ef-b11c-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24113 RAZ_Bamber_Emily_C._2024.7z RAZ_Bamber_Emily_C._2024.7z 1 9D4ACFAA643EFA798ED85957797ACF5A ac5b914bde7faf66790090367e365509b6f244ad9d5267fe877c8f2c061298b1 75fc6ff4-bf5f-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24461 Zavod za gradbeništvo Slovenije 0 0 0