Surface movements of emplaced lava flows measured by synthetic aperture radar interferometry

Stevens, N. F.; Wadge, G.; Williams, C. A.; Morley, Jeremy; Muller, JP; Murray, John B.; Upton, M. H.

doi:10.1029/2000jb900425

Cited by 62 publications

(63 citation statements)

References 45 publications

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“…The amount of voids within the flow field is testified by the vertical displacement by cooling and contraction measured using spaceborne synthetic aperture radar interferometry~9 months after the end of the eruption [64], and observed also at other volcanoes [67]. It is noteworthy that the greatest contraction affected the thickest zones of the flow field, these being the eruptive fissure and the middle line of Flow 2, following the path of the master tube that fed the lava flow field (Figure 8).…”

Section: Discussionmentioning

confidence: 95%

Satellite and Ground Remote Sensing Techniques to Trace the Hidden Growth of a Lava Flow Field: The 2014–2015 Effusive Eruption at Fogo Volcano (Cape Verde)

et al. 2018

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Fogo volcano erupted in 2014-2015 producing an extensive lava flow field in the summit caldera that destroyed two villages, Portela and Bangaeira. The eruption started with powerful explosive activity, lava fountains, and a substantial ash column accompanying the opening of an eruptive fissure. Lava flows spreading from the base of the eruptive fissure produced three arterial lava flows. By a week after the start of the eruption, a master lava tube had already developed within the eruptive fissure and along the arterial flow. In this paper, we analyze the emplacement processes based on observations carried out directly on the lava flow field, remote sensing measurements carried out with a thermal camera, SO 2 fluxes, and satellite images, to unravel the key factors leading to the development of lava tubes. These were responsible for the rapid expansion of lava for thẽ 7.9 km length of the flow field, as well as the destruction of the Portela and Bangaeira villages. The key factors leading to the development of tubes were the low topography and the steady magma supply rate along the arterial lava flow. Comparing time-averaged discharge rates (TADR) obtained from satellite and Supply Rate (SR) derived from SO 2 flux data, we estimate the amount and timing of the lava flow field endogenous growth, with the aim of developing a tool that could be used for hazard assessment and risk mitigation at this and other volcanoes.

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Section: Discussionmentioning

confidence: 95%

Satellite and Ground Remote Sensing Techniques to Trace the Hidden Growth of a Lava Flow Field: The 2014–2015 Effusive Eruption at Fogo Volcano (Cape Verde)

et al. 2018

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“…It has been used to measure deformation at hundreds of volcanoes around the world and has captured a range of processes associated with the movement of subsurface fluids (e.g., Pinel et al 2014). Interferograms have also been used to map active lava flows (Dietterich et al 2012), estimate topographic change (e.g., Sigmundsson et al 1997;Wadge et al 2006;Ebmeier et al 2012;Poland 2014) and measure postemplacement subsidence and mass-wasting (e.g., Stevens et al 2001;Wadge et al 2011;Ebmeier et al 2014).…”

Section: Topographic Change From Satellite Radar Imagesmentioning

confidence: 99%

Mapping and measuring lava volumes from 2002 to 2009 at El Reventador Volcano, Ecuador, from field measurements and satellite remote sensing

et al. 2016

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Estimates of lava volume, and thus effusion rate, are critical for assessing volcanic hazard and are a priority for volcano observatories with responsibility for monitoring. The choice of specific methods used to approximate lava volume depends on both volcanological and practical considerations; in particular, whether field measurements are possible and how often they can be repeated. Volcán El Reventador (Ecuador) is inaccessible, and field measurements can only be made infrequently at a few locations in its caldera. We present both planimetric field and topographic satellite radar-based measurements of lava flow thicknesses and volumes for activity at El Reventador between 2002 and 2009. Lava volumes estimates range from 75 ± 24 × 10 6 m 3 (based on field measurements of flow thickness) to 90 ± 37 × 10 6 m 3 (from satellite radar retrieval of flow thickness), corresponding to time-averaged effusion rates of 9 ± 4 m 3 /s and 7 ± 2 m 3 /s, respectively. Detailed flow mapping from aerial imagery demonstrate that lava effusion rate was at its peak at the start of each eruption phase and decreased over time. Measurements of lava thickness made from a small set of Synthetic Aperture Radar (SAR) interferograms allowed the retrieval of the shape of the compound lava flow field and show that in 2009 it was subsiding by up to 6 cm/year. Satellite radar measurements thus have the potential to be a valuable supplement to ground-based monitoring at El Reventador and other inaccessible volcanoes.

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“…Sigmundsson et al, 1997;Johnson et al, 2000). Similarly, lava flows and their substratum also slowly compact by thermal and physical mechanisms so subsidence may again be observed (Stevens et al, 2001).…”

Section: Introductionmentioning

confidence: 95%

Co-eruptive and inter-eruptive surface deformation measured by satellite radar interferometry at Nyamuragira volcano, D.R. Congo, 1996 to 2010

Toombs¹,

Wadge²

2012

Journal of Volcanology and Geothermal Research

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Surface movements of emplaced lava flows measured by synthetic aperture radar interferometry

Cited by 62 publications

References 45 publications

Satellite and Ground Remote Sensing Techniques to Trace the Hidden Growth of a Lava Flow Field: The 2014–2015 Effusive Eruption at Fogo Volcano (Cape Verde)

Satellite and Ground Remote Sensing Techniques to Trace the Hidden Growth of a Lava Flow Field: The 2014–2015 Effusive Eruption at Fogo Volcano (Cape Verde)

Mapping and measuring lava volumes from 2002 to 2009 at El Reventador Volcano, Ecuador, from field measurements and satellite remote sensing

Co-eruptive and inter-eruptive surface deformation measured by satellite radar interferometry at Nyamuragira volcano, D.R. Congo, 1996 to 2010

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