Ground deformation reveals the scale-invariant conduit dynamics driving explosive basaltic eruptions

Alessandro Aiuppa, Luca Innocenti, Donatella Mangione, Francesco Paolo La Monica, Dario Delle Donne, Pistolesi, Laiolo, Lacanna, Genco, Mangione, Takeshi Nishimura, Marcello Bitetto, Silengo, Massimetti, Delle Donne, Innocenti, Ricciardi, La Monica, Delle Donne, RipepeRosi, Marchetti, Della Schiava, Coppola, Daniela Coppola

Risultato della ricerca: Articlepeer review

Abstract

The mild activity of basaltic volcanoes is punctuated by violent explosive eruptions that occur without obvious precursors. Modelling the source processes of these sudden blasts is challenging. Here, we use two decades of ground deformation (tilt) records from Stromboli volcano to shed light, with unprecedented detail, on the short-term (minute-scale) conduit processes that drive such violent volcanic eruptions. We find that explosive eruptions, with source parameters spanning seven orders of magnitude, all share a common pre-blast ground inflation trend. We explain this exponential inflation using a model in which pressure build-up is caused by the rapid expansion of volatile-rich magma rising from depth into a shallow (<400m) resident magma conduit. We show that the duration and amplitude of this inflation trend scales with the eruption magnitude, indicating that the explosive dynamics obey the same (scale-invariant) conduit process. This scale-invariance of pre-explosion ground deformation may usher in a new era of short-term eruption forecasting.
Lingua originaleEnglish
pagine (da-a)1683-
Numero di pagine8
RivistaNature Communications
Volume12
Stato di pubblicazionePublished - 2021

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.1300.1300???
  • ???subjectarea.asjc.3100.3100???

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