Nonlinear dynamics of lava dome extrusion

@article{Melnik1999NonlinearDO,
  title={Nonlinear dynamics of lava dome extrusion},
  author={Oleg Eduardovich Melnik and R. Stephen J. Sparks},
  journal={Nature},
  year={1999},
  volume={402},
  pages={37-41}
}
During the eruption of the Soufrière Hills volcano, Montserrat (1995–99), and several other dome eruptions, shallow seismicity, short-lived explosive eruptions and ground deformation patterns indicating large overpressures (of several megapascals) in the uppermost few hundred metres of the volcanic conduit have been observed. These phenomena can be explained by the nonlinear effects of crystallization and gas loss by permeable flow, which are here incorporated into a numerical model of conduit… 

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References

SHOWING 1-10 OF 50 REFERENCES
Seismicity associated with dome growth and collapse at the Soufriere Hills Volcano, Montserrat
Varied seismicity has accompanied growth and collapse of the lava dome of the Soufriere Hills Volcano, Montserrat. Earthquakes have been classified as either volcano-tectonic, long-period or hybrid,
Magma flow instability and cyclic activity at soufriere hills volcano, montserrat, british west indies
TLDR
Dome growth at the Soufriere Hills volcano (1996 to 1998) was frequently accompanied by repetitive cycles of earthquakes, ground deformation, degassing, and explosive eruptions, which allowed short-term forecasting of timing, and of eruption style related to explosivity potential.
Overview of the eruption of Soufriere Hills Volcano, Montserrat, 18 July 1995 to December 1997
The onset of phreatic volcanic activity at the Soufriere Hills volcano, Montserrat on 18 July 1995 followed a three-year period of heightened volcano-seismic activity beneath the island. Phreatic
Magma fragmentation by rapid decompression
THE processes leading to magma fragmentation and the generation of pyroclastic debris during explosive volcanic eruptions are of fundamental importance in volcanology. Observations of explosive
Gas content, eruption rate and instabilities of eruption regime in silicic volcanoes
Abstract In silicic volcanoes, eruptions commonly begin with violent explosive phases and evolve towards a regime of dome formation. This transition is characterized by a decrease of gas volume
On the variations of flow rate in non-explosive lava eruptions
Abstract A physical model is developed to determine factors which influence the dynamics of non-explosive lava eruptions. In the model, magma rises in a laminar regime from an overpressured chamber
A model of vulcanian eruptions at Galeras volcano, Colombia
Abstract A series of six vulcanian eruptions at Galeras volcano, Colombia, occurred during 1992–1993. These eruptions followed the emplacement of a lava dome in late 1991, which was accompanied by
Causes and consequences of pressurisation in lava dome eruptions
Abstract High total and fluid pressures develop in the interior of high-viscosity lava domes and in the uppermost parts of the feeding conduit system as a consequence of degassing. Two effects are
Magma production and growth of the lava dome of the Soufriere Hills Volcano, Montserrat, West Indies:
From November 1995 to December 1997 a total volume of 246 × 106 (DRE) m³ of andesite magma erupted, partitioned into 93 × 106 m³ of the dome, 125 × 106 m³ of pyroclastic flow deposits and 28 × 106 m³
Petrologic determination of ascent rates for the 1995–1997 Soufriere Hills Volcano andesitic magma
The recent eruption of the Soufriere Hills Volcano in Montserrat (July, 1995, to present; October, 1997) has produced a hornblende-bearing, andesitic lava dome. It is possible to petrologically
...
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