Seismicity associated with dome growth and collapse at the Soufriere Hills Volcano, Montserrat

Miller, Angus D.; Stewart, R. C.; White, Randall A.; Luckett, Richard; Baptie, Brian; Aspinall, Willy; Latchman, Joan L.; Lynch, Lloyd; Voight, B.

doi:10.1029/98gl01778

Cited by 139 publications

(63 citation statements)

References 9 publications

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“…Since 1997, it has been a statutory body of the Government of Montserrat and was initially managed by the British Geological Survey (BGS). The monitoring backbone of the MVO was established between 1995 and 2000: local networks of seismometers, continuous GPS (cGPS) receivers, spectroscopic measurements of sulphur dioxide and geodetic measurement of the gross shape of the lava dome (Mattioli et al 1998;Miller et al 1998;Neuberg et al 1998;Sparks et al 1998;White et al 1998;Young et al 1998;Gardner & White 2002 (Edmonds et al 2003a). The dome continued to be surveyed by a combination of groundbased photogrammetry with occasional helicopter-based photogrammetry, and ground-based and helicopter-based (June 2010) LiDAR (Light Detection And Ranging) survey.…”

Section: Mvomentioning

confidence: 99%

Chapter 1 An overview of the eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010

Wadge

Voight

Sparks

et al. 2014

Memoirs

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Abstract:The 1995-present eruption of Soufrière Hills Volcano on Montserrat has produced over a cubic kilometre of andesitic magma, creating a series of lava domes that were successively destroyed, with much of their mass deposited in the sea. There have been five phases of lava extrusion to form these lava domes: -March 1998-July 2003 August 2005-April 2007July 2008-January 2009 and October 2009-February 2010. It has been one of the most intensively studied volcanoes in the world during this time, and there are long instrumental and observational datasets. From these have sprung major new insights concerning: the cyclicity of magma transport; low-frequency earthquakes associated with conduit magma flow; the dynamics of lateral blasts and Vulcanian explosions; the role that basalt-andesite magma mingling in the mid-crust has in powering the eruption; identification using seismic tomography of the uppermost magma reservoir at a depth of 5.5 . 7.5 km; and many others. Parallel to the research effort, there has been a consistent programme of quantitative risk assessment since 1997 that has both pioneered new methods and provided a solid evidential source for the civil authority to use in mitigating the risks to the people of Montserrat.At the time of writing (January 2013), the Soufrière Hills Volcano (SHV) is in its 17th year of eruption, placing it with a select group of very long-lived eruptions from silicic volcanoes. Within the Caribbean plate, only two other silicic volcanoes have had longer-lived historical extrusive eruptions: Santiaguito, Guatemala (1922( -present: Harris et al. 2003 and Arenal, Costa Rica (1968 -present: Wadge et al. 2006). As with both of these volcanoes, SHV has not extruded lava continuously for the whole eruption, but has erupted intermittently. In fact, it has been extruding lava for a cumulative total of only 8.5 years out of 17. So in what sense can we consider this a single eruption rather than a series of shorter ones? The longest gaps between extrusive phases have been about 2-3 years (July 2003-August 2005 February 2010-present). However, during the pauses between extrusion at SHV, there have been many indications that the volcanic system remains active. These have included inflation of the island's surface, the release of volatiles in quantities similar to those seen during lava extrusion, swarms of low-frequency seismicity, explosions and the production of ash. This suggests that there are processes within the system responsible for producing alternating extrusive and non-extrusive states. Melnik & Sparks (2005) showed theoretically how non-linear response to relatively minor perturbations of the magmatic system can result in such behaviour.Recognition of the long-term continuity of the eruption process has direct consequences for the tasks of monitoring and estimating the risks posed by the volcano. It means that the Montserrat Volcano Observatory (MVO) must monitor the volcano continuously, even during periods of relative quiescence and apparent inactivity. The probabil...

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Section: Mvomentioning

confidence: 99%

Chapter 1 An overview of the eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010

Wadge

Voight

Sparks

et al. 2014

Memoirs

Self Cite

139

119

View full text Add to dashboard Cite

show abstract

“…In addition, all these models consider a yield strength that produces a 240 continuous shear band along the entire length of the upper conduit. This suggests that 241 the lava extruded at the free-surface is always along shear boundaries when LP 242 seismicity occurs, which is not the case (Miller et al, 1998;Watts et al, 2002). Hence, 243…”

Section: Computational Model 230mentioning

confidence: 99%

“…Typically, during cyclic deformation periods, lava dome 156 growth will stagnate and the accompanying rockfall activity from the dome is also 157 reduced. Although the free-surface extrusion rate drops, the deep driving pressure 158 remains high resulting in shallow pressurisation (Miller et al, 1998). LP earthquakes 159 mark a change in regime of the upper conduit (Neuberg et al, 2006).…”

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confidence: 99%

Magma flow instabilities in a volcanic conduit: Implications for long-period seismicity

Hale

2007

Physics of the Earth and Planetary Interiors

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“…The event types used on Montserrat ( Figure 6) were first described in Miller et al, (1998). Briefly, these are:…”

Section: Use Of Seismic Data For Monitoringmentioning

confidence: 99%

Seismic Monitoring of the Soufriere Hills Volcano, Montserrat

Luckett¹,

Baptie²,

Ottemöller³

et al. 2007

Seismological Research Letters

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Seismicity associated with dome growth and collapse at the Soufriere Hills Volcano, Montserrat

Cited by 139 publications

References 9 publications

Chapter 1 An overview of the eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010

Chapter 1 An overview of the eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010

Magma flow instabilities in a volcanic conduit: Implications for long-period seismicity

Seismic Monitoring of the Soufriere Hills Volcano, Montserrat

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