Lava dome collapse detected using passive seismic interferometry

Baptie, Brian

doi:10.1029/2010gl042489

Cited by 10 publications

(10 citation statements)

References 17 publications

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“…This was the first time that a major collapse seemingly was able to end magma flow to the surface. A swarm of 9500 hybrid earthquakes began on 9 July and merged into tremor by 12 July, indicative of magma pressurizing within the upper OVERVIEW OF THE SHV ERUPTION FROM 2000TO 2010 by guest on May 12, 2018 http://mem.lyellcollection.org/ Downloaded from (Fig. 1.6).…”

Section: -2010mentioning

confidence: 99%

“…A series of sea-floor bathymetric imaging, sampling and drilling surveys from 1998 to 2010 revealed the extent of offshore deposits, and the complexity of depositional processes (e.g. Trofimovs et al 2006;Le Friant et al 2009, 2010. Infrasound arrays deployed at St George's Hill, Lees Yard and the Waterworks showed how the timing and directionality of explosive signals could be interpreted .…”

Section: Mvomentioning

confidence: 99%

“…Neuberg et al (1998) emphasized that, although low-frequency events can be subdivided into the long-period and hybrid families, the two event types are similar and represent end members of a continuum, with common source processes. OVERVIEW OF THE SHV ERUPTION FROM 2000TO 2010There has been an overall reduction in the amount of seismicity recorded throughout the eruption. This is particularly so for hybrid events (associated with magma ascent and precursory to numerous dome collapses: Luckett et al 2008) and VT events, which tend to appear in swarms prior to the renewal of extrusion.…”

Section: Seismicitymentioning

confidence: 99%

“…This is complementary with the ability of infrasound arrays and thermal cameras to track flow advance . Passive seismic interferometry, or noise analysis, was used by Baptie (2010) to show that for major perturbations to the volcano -in this case the 12 July 2003 collapse -the seismic velocity character of the volcano changed measurably at the event, although it did not appear to have value as a warning measure. …”

Section: Volcanic Seismicitymentioning

confidence: 99%

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

Wadge

Voight

Sparks

et al. 2014

Memoirs

139

119

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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: -2010mentioning

confidence: 99%

Section: Mvomentioning

confidence: 99%

Section: Seismicitymentioning

confidence: 99%

Section: Volcanic Seismicitymentioning

confidence: 99%

See 2 more Smart Citations

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

Wadge

Voight

Sparks

et al. 2014

Memoirs

139

119

View full text Add to dashboard Cite

show abstract

“…Th e HZ ratio is a new and interesting parameter to analyze in ambient noise cross-correlations. For instance, Baptie (2010) reports on an abrupt change in the relative amplitudes between vertical and radial components of cross-correlations at Montserrat Volcano before and after a dome collapse. Such an abrupt change may indeed be the result of time-varying structure beneath the seismometer, within the volcanic edifi ce.…”

Section: Discussionmentioning

confidence: 99%

Interpretation of Rayleigh-wave ellipticity observed with multicomponent passive seismic interferometry at Hekla Volcano, Iceland

et al. 2011

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The 2010 eruption of Eyjafjallajökull has drawn increased attention to Iceland's Eastern Volcanic Zone (EVZ) due to the threat it poses to the heavily used air-traffic corridors of the northern Atlantic Ocean. Within the EVZ, Hekla is historically one of the most active volcanoes and has exhibited a decadal eruption pattern for the past 40 years. Hekla most recently erupted in 2000 and is thus ripe for another decadal eruption. Because Hekla is generally aseismic, except for a brief time period (hours) leading up to an eruption, monitoring has previously depended on precursory deformation signals (Linde et al., 1993). As a result, seismic tomography of the internal structure of the volcano using phase arrivals of local earthquakes is not possible. Motivated by Hekla's practically aseismic behavior in inter-eruptive periods, we installed a temporary network of four broadband seismometers around the volcanic edifice in late August 2010 with the intention of investigating the applicability of passive seismic interferometry (PSI) for imaging and monitoring the volcano.

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Monitoring changes in seismic velocity related to an ongoing rapid inflation event at Okmok volcano, Alaska

et al. 2015

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Okmok is one of the most active volcanoes in the Aleutian Arc. In an effort to improve our ability to detect precursory activity leading to eruption at Okmok, we monitor a recent, and possibly ongoing, GPS‐inferred rapid inflation event at the volcano using ambient noise interferometry (ANI). Applying this method, we identify changes in seismic velocity outside of Okmok's caldera, which are related to the hydrologic cycle. Within the caldera, we observe decreases in seismic velocity that are associated with the GPS‐inferred rapid inflation event. We also determine temporal changes in waveform decorrelation and show a continual increase in decorrelation rate over the time associated with the rapid inflation event. The magnitude of relative velocity decreases and decorrelation rate increases are comparable to previous studies at Piton de la Fournaise that associate such changes with increased production of volatiles and/or magmatic intrusion within the magma reservoir and associated opening of fractures and/or fissures. Notably, the largest decrease in relative velocity occurs along the intrastation path passing nearest to the center of the caldera. This observation, along with equal amplitude relative velocity decreases revealed via analysis of intracaldera autocorrelations, suggests that the inflation source may be located approximately within the center of the caldera and represent recharge of shallow magma storage in this location. Importantly, there is a relative absence of seismicity associated with this and previous rapid inflation events at Okmok. Thus, these ANI results are the first seismic evidence of such rapid inflation at the volcano.

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Lava dome collapse detected using passive seismic interferometry

Cited by 10 publications

References 17 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

Interpretation of Rayleigh-wave ellipticity observed with multicomponent passive seismic interferometry at Hekla Volcano, Iceland

Monitoring changes in seismic velocity related to an ongoing rapid inflation event at Okmok volcano, Alaska

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