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

Fee, David; Yokoo, Akihiko; Johnson, J. B.

doi:10.1785/0220140051

Cited by 23 publications

(38 citation statements)

References 39 publications

(46 reference statements)

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“…Interestingly, the two largest amplitude infrasound transients (events VII and X) corresponding to medium-sized volume output events as classified both in plume digitization and in monopole source modeling. This poor scaling between Sakurajima plume height and peak pressure is also noted by Fee et al (2014;this Focus Section) and has been generally observed for explosions at other volcanoes, such as at Tungurahua (Ecuador; Johnson et al, 2005).…”

Section: Comparison Of Infrasound-inferred Volume Growth and Time-lapmentioning

confidence: 62%

“…It is notable, however, that some of the sensors deployed by other teams at Sakurajima varied in their response and/or had an approximate ∼0:1 Hz high-pass filter applied during routine processing (see fig. 2 of Fee et al, 2014;this Focus Section). Records from these sensors would require proper signal reconstitution prior to quantification of flux and or volume flux measurements.…”

Section: Instrument Considerationsmentioning

confidence: 96%

“…2; Fee et al, 2014;this Focus Section). Global Positioning System (GPS) time stamped pressures signals were continuously recorded with 24-bit DataCube loggers at 200 Hz.…”

Section: Experiments Overviewmentioning

confidence: 99%

“…These events compose a subset of the 34 large explosions referenced in Fee et al (2014;this Focus Section), and correspond to those explosions, for which we have recorded coincident high-quality time-lapse imagery at 5.5 s intervals. Analyzed signal comes from four elements of KURA, located ∼3500 m from the Showa Crater vent (Fig.…”

Section: Application Of the Simple Monopole Source To Sakurajima Infrmentioning

confidence: 99%

“…Waveform variability across an infrasound network was highlighted by Fee et al (2014;this Focus Section), who state that waveform shape is affected by intervening topography, which diffracts sound waves around the crater rim and also above and over the edifice. Primary effects of topography are investigated with finite difference time domain techniques such as those presented by Kim et al (2014;this Focus Section), who found that topography influences waveform character most significantly at stations beyond the line-of-sight of the Showa Crater.…”

Section: Propagation Considerationsmentioning

confidence: 99%

See 4 more Smart Citations

Application of the Monopole Source to Quantify Explosive Flux during Vulcanian Explosions at Sakurajima Volcano (Japan)

Johnson

Miller

2014

Seismological Research Letters

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Section: Comparison Of Infrasound-inferred Volume Growth and Time-lapmentioning

confidence: 62%

Section: Instrument Considerationsmentioning

confidence: 96%

“…2; Fee et al, 2014;this Focus Section). Global Positioning System (GPS) time stamped pressures signals were continuously recorded with 24-bit DataCube loggers at 200 Hz.…”

Section: Experiments Overviewmentioning

confidence: 99%

Section: Application Of the Simple Monopole Source To Sakurajima Infrmentioning

confidence: 99%

Section: Propagation Considerationsmentioning

confidence: 99%

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Application of the Monopole Source to Quantify Explosive Flux during Vulcanian Explosions at Sakurajima Volcano (Japan)

Johnson

Miller

2014

Seismological Research Letters

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Acoustic source inversion to estimate volume flux from volcanic explosions

Kim

Fee

Yokoo

et al. 2015

Geophysical Research Letters

129

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We present an acoustic waveform inversion technique for infrasound data to estimate volume fluxes from volcanic eruptions. Previous inversion techniques have been limited by the use of a 1‐D Green's function in a free space or half space, which depends only on the source‐receiver distance and neglects volcanic topography. Our method exploits full 3‐D Green's functions computed by a numerical method that takes into account realistic topographic scattering. We apply this method to vulcanian eruptions at Sakurajima Volcano, Japan. Our inversion results produce excellent waveform fits to field observations and demonstrate that full 3‐D Green's functions are necessary for accurate volume flux inversion. Conventional inversions without consideration of topographic propagation effects may lead to large errors in the source parameter estimate. The presented inversion technique will substantially improve the accuracy of eruption source parameter estimation (cf. mass eruption rate) during volcanic eruptions and provide critical constraints for volcanic eruption dynamics and ash dispersal forecasting for aviation safety. Application of this approach to chemical and nuclear explosions will also provide valuable source information (e.g., the amount of energy released) previously unavailable.

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Experimental laboratory study on the formation of multiple shock waves observed during volcanic eruptions

Médici

Waite

2016

Geophysical Research Letters

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Sequences of multiple pressure waves have recently been observed in different explosive volcanic eruptions, but their origin is not clearly understood. Although a pulsating type of eruption with many individual discharges can produce this effect, the formation of multiple shock waves could also result from a single discharge through (1) the dynamics of the shock wave itself, (2) the coupled shock wave‐supersonic jet dynamics, or (3) a combination of these factors. Shock tube experiments were performed to evaluate these potential mechanisms under controlled laboratory conditions. The amount of energy released was varied to achieve different weak shock wave conditions and to promote formation of single or multiple shock waves through both shock wave dynamics and coupled shock wave‐supersonic jet interactions. Our analysis indicates that both mechanisms may play a role in the formation of multiple pressure waves in low‐intensity eruptions.

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

Cited by 23 publications

References 39 publications

Application of the Monopole Source to Quantify Explosive Flux during Vulcanian Explosions at Sakurajima Volcano (Japan)

Application of the Monopole Source to Quantify Explosive Flux during Vulcanian Explosions at Sakurajima Volcano (Japan)

Acoustic source inversion to estimate volume flux from volcanic explosions

Experimental laboratory study on the formation of multiple shock waves observed during volcanic eruptions

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