Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes

Dario Delle Donne, Marco Pistolesi, Marco Laiolo, Giorgio Lacanna, Riccardo Genco, Sébastien Valade, Maurizio Ripepe, Emanuele Marchetti, Giacomo Ulivieri, Diego Coppola

Risultato della ricerca: Article

16 Citazioni (Scopus)

Abstract

Effusive eruptions at open-conduit volcanoes are interpreted as reactions to a disequilibrium induced by the increase in magma supply. By comparing four of the most recent effusive eruptions at Stromboli volcano (Italy), we show how the volumes of lava discharged during each eruption are linearly correlated to the topographic positions of the effusive vents. This correlation cannot be explained by an excess of pressure within a deep magma chamber and raises questions about the actual contributions of deep magma dynamics. We derive a general model based on the discharge of a shallow reservoir and the magmastatic crustal load above the vent, to explain the linear link. In addition, we show how the drastic transition from effusive to violent explosions can be related to different decompression rates. We suggest that a gravity-driven model can shed light on similar cases of lateral effusive eruptions in other volcanic systems and can provide evidence of the roles of slow decompression rates in triggering violent paroxysmal explosive eruptions, which occasionally punctuate the effusive phases at basaltic volcanoes.
Lingua originaleEnglish
Numero di pagine9
RivistaScientific Reports
Volume7
Stato di pubblicazionePublished - 2017

All Science Journal Classification (ASJC) codes

  • General

Fingerprint Entra nei temi di ricerca di 'Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes'. Insieme formano una fingerprint unica.

  • Cita questo

    Delle Donne, D., Pistolesi, M., Laiolo, M., Lacanna, G., Genco, R., Valade, S., Ripepe, M., Marchetti, E., Ulivieri, G., & Coppola, D. (2017). Forecasting Effusive Dynamics and Decompression Rates by Magmastatic Model at Open-vent Volcanoes. Scientific Reports, 7.