Mechanism of explosive eruption revealed by geophysical observations at the Sakurajima, Suwanosejima and Semeru volcanoes

Iguchi, Masato; Yakiwara, Hiroshi; Tameguri, Takeshi; Hendrasto, Muhamad; Hirabayashi, Jun-ichi

doi:10.1016/j.jvolgeores.2007.10.010

Cited by 128 publications

(137 citation statements)

References 8 publications

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“…eruptions at Sakurajima volcano, Japan (Iguchi et al, 2008). The strain changes recorded during the 2011-2013 lava fountains erupted from the NSEC allowed constraining the decompression source at a shallow level (shallow plumbing system).…”

Section: Results-strain and Deformation Modeling Co-eruptive Short-tementioning

confidence: 99%

Coupled Short- and Medium-Term Geophysical Signals at Etna Volcano: Using Deformation and Strain to Infer Magmatic Processes From 2009 to 2017

et al. 2018

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In active volcanoes a main challenge is to identify and characterize the dynamics of magmatic sources from deformation and strain data. This task is of primary importance in frequently eruptive volcanoes, such as Etna. After the main flank eruption of [2008][2009] and until 2017, Etna volcano was characterized by a lively eruptive activity of different phases. These comprised 44 lava fountain episodes from the New South East Crater (NSEC), two sequences of close episodes of lava fountains from the Voragine crater (VOR), as well as some periods of summit effusive activity with a more prolonged supply of lava flows. Several studies have described and modeled single lava fountains episodes of the NSEC and VOR, in particular through high precision data from borehole strain-meters. In this study, we broaden the analysis also considering the medium-term volcano recharging/discharging periods preceding/accompanying the different eruptive phases during 2009-2017 by constraining the source positions through deformation recorded by the permanent GPS network. Together with the modeling deduced from the strain-meter data we produce a more complete representation of the different sources that characterized the different periods both in the medium-term (i.e., the preparatory phases showing inflation and the eruptive phases showing deflation) and in the short-term (i.e., the fast discharge associated with eruptive events). Our modeling explains the pathway of magma from the intermediate-shallow plumbing system to the surface and highlights a clear separation between the inflation and the deflation source depths, coherently with petrological constraints on the spatio-temporal evolution of magma transfer and storage.

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Section: Results-strain and Deformation Modeling Co-eruptive Short-tementioning

confidence: 99%

Coupled Short- and Medium-Term Geophysical Signals at Etna Volcano: Using Deformation and Strain to Infer Magmatic Processes From 2009 to 2017

et al. 2018

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“…At Asama volcano, inflation tilt changes were observed prior to the eruptions in 2004 (Churei and Katayama, 2006). Tilt and strain changes associated with a vulcanian event at Sakurajima volcano (Iguchi et al, 2008). Iguchi et al (2008) explained the process of precursory signal and eruption as follows: (1) pressure and volume increase during inflation caused by intrusion of magma and accumulation of volcanic gas in the conduit, and (2) pressure and volume decrease during deflation as magma and gas are erupted.…”

Section: Discussion and Interpretation Of Shinmoedake Magmatic Systemmentioning

confidence: 99%

The 2011 eruptive activity of Shinmoedake volcano, Kirishimayama, Kyushu, Japan—Overview of activity and Volcanic Alert Level of the Japan Meteorological Agency—

Kato

Yamasato

2013

Earth Planet Sp

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“…This precursory wave was followed by a shock wave associated with the onset of the main explosion. Yokoo et al (2013) expanded on previous work by others (e.g., Iguchi et al, 2008) and utilized a multiparameter dataset to model the processes leading up to vulcanian explosions at Sakurajima.…”

Section: Sakurajima Volcanomentioning

confidence: 99%

Introduction to an Open Community Infrasound Dataset from the Actively Erupting Sakurajima Volcano, Japan

Fee

Yokoo

Johnson

2014

Seismological Research Letters

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Mechanism of explosive eruption revealed by geophysical observations at the Sakurajima, Suwanosejima and Semeru volcanoes

Cited by 128 publications

References 8 publications

Coupled Short- and Medium-Term Geophysical Signals at Etna Volcano: Using Deformation and Strain to Infer Magmatic Processes From 2009 to 2017

Coupled Short- and Medium-Term Geophysical Signals at Etna Volcano: Using Deformation and Strain to Infer Magmatic Processes From 2009 to 2017

The 2011 eruptive activity of Shinmoedake volcano, Kirishimayama, Kyushu, Japan—Overview of activity and Volcanic Alert Level of the Japan Meteorological Agency—

Introduction to an Open Community Infrasound Dataset from the Actively Erupting Sakurajima Volcano, Japan

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