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- W4380992356 abstract "Abstract We apply dynamical models to estimate the rheological properties of magma and lava during the 2021–22 eruption of La Soufrière Volcano, St Vincent. Analysis of the emplacement of a lava coulée gives viscosities in the range 0.94 × 10 10 Pa s to 5.97 × 10 10 Pa s. A static Bingham model gives a yield strength of 4.1 × 10 5 Pa. A dynamical model of conduit flow during the explosive phase of the eruption gives a viscosity range from 1.2 × 10 7 to 2.3 × 10 9 Pa s. A petrological model of magma viscosity in the source region falls in the range 10 2 to 10 3 Pa s. The very high viscosity of the lava is attributed to the presence of a remnant degassed and partially crystallized magma from previous eruptions that occupied the shallow conduit–vent system prior to onset of the 2021 explosive eruptions. Gas-rich magma pushed this degassed remnant magma out over a three-month period at a steady rate of about 1.2 m 3 s −1 and the explosive phase began when volatile-rich and much lower viscosity magma reached the surface." @default.
- W4380992356 created "2023-06-17" @default.
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- W4380992356 date "2023-08-10" @default.
- W4380992356 modified "2023-10-16" @default.
- W4380992356 title "Analysis of magma rheology from lava spreading and explosive activity during the 2020-2021 eruption of the Soufrière St Vincent with implications for eruption dynamics" @default.
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- W4380992356 doi "https://doi.org/10.1144/sp539-2022-284" @default.
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