Co-eruptive subsidence at Galeras identified during an InSAR survey of Colombian volcanoes (2006–2009)

Parks, Michelle; Biggs, Juliet; Mather, Tamsin A.; Pyle, David M.; Amelung, F.; Monsalve, María Luisa; Medina, Lourdes Narváez

doi:10.1016/j.jvolgeores.2011.02.007

Cited by 29 publications

(17 citation statements)

References 63 publications

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“…Such intrusions could only be classified as 'pre-eruptive' in retrospect. Distinguishing between a shallow preexisting reservoir being 'charged' by an intrusion (e.g., as interpreted at Santorini, Parks et al, 2012) and endogenous growth of a volcanic edifice (e.g., Tungurahua, Biggs et al, 2010a, b;Fernandina, Bagnardi et al, 2013) therefore requires an understanding of the pre-existing magmatic plumbing. These historical deformation measurements provide a useful baseline for interpreting future episodes of uplift in particular.…”

Section: Pre-eruptive Deformationmentioning

confidence: 99%

“…In other cases (e.g., at Tungurahua, Fig. 5A; Galeras, Parks et al, 2011), InSAR has allowed the detection of displacement associated with magmatic intrusion beneath regions where the installation and maintenance of ground based instruments would have been too dangerous. All of the deformation signals attributed to magmatic processes detected thus far are smaller than the footprint of TOPS mode Sentinel-1 imagery (~250 km), although several exceed the area of higher resolution instruments, such as COSMOSkyMed and TerraSAR-X (e.g., at Uturuncu, Lazufre, Lassen, Fig.…”

Section: Spatial Properties Of Volcanic and Magmatic Insar Signalsmentioning

confidence: 99%

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Synthesis of global satellite observations of magmatic and volcanic deformation: implications for volcano monitoring & the lateral extent of magmatic domains

et al. 2018

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Global Synthetic Aperture Radar (SAR) measurements made over the past decades provide insights into the lateral extent of magmatic domains, and capture volcanic process on scales useful for volcano monitoring. Satellite-based SAR imagery has great potential for monitoring topographic change, the distribution of eruptive products and surface displacements (InSAR) at subaerial volcanoes. However, there are challenges in applying it routinely, as would be required for the reliable operational assessment of hazard. The deformation detectable depends upon satellite repeat time and swath widths, relative to the spatial and temporal scales of volcanological processes. We describe the characteristics of InSAR-measured volcano deformation over the past two decades, highlighting both the technique's capabilities and its limitations as a monitoring tool. To achieve this, we draw on two global datasets of volcano deformation: the Smithsonian Institution Volcanoes of the World database and the Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics volcano deformation catalogue, as well as compiling some measurement characteristics and interpretations from the primary literature. We find that a higher proportion of InSAR observations capture non-eruptive and non-magmatic processes than those from ground-based instrument networks, and that both transient (< month) and long-duration (> 5 years) deformation episodes are under-represented. However, satellite radar is already used to assess the development of extended periods of unrest and long-lasting eruptions, and improved spatial resolution and coverage have resulted in the detection of previously unrecognised deformation at both ends of the spatial scale (~10 to > 1000 km 2 ). 'Baseline' records of past InSAR measurements, including 'null' results, are fundamental for any future interpretation of interferograms in terms of hazard‚ both by providing information about past deformation at an individual volcano, and for assessing the characteristics of deformation that are likely to be detectable (and undetectable) using InSAR. More than half of all InSAR deformation signals attributed to magmatic processes have sources in the shallow crust (< 5 km depth). While the depth distribution of InSAR-derived deformation sources is affected by measurement limitations, their lateral distribution provides information about the extent of active magmatic domains. Deformation is common (24% of all potentially magmatic events) at loci ≥5 km away from the nearest active volcanic vent. This demonstrates that laterally extensive active magmatic domains are not exceptional, but can comprise the shallowest part of trans-crustal magmatic systems in a range of volcanic settings.

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Section: Pre-eruptive Deformationmentioning

confidence: 99%

Section: Spatial Properties Of Volcanic and Magmatic Insar Signalsmentioning

confidence: 99%

Synthesis of global satellite observations of magmatic and volcanic deformation: implications for volcano monitoring & the lateral extent of magmatic domains

et al. 2018

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“…This is particularly notorious in the case of oceanic islands and, especially, in the case of El Hierro, where the steep relief of the island introduces variations in the interferometric phase due to temporal changes in temperature, pressure and water vapor (Gonzalez et al, 2010;González et al, 2013;Parks et al, 2011). Previous InSAR analyses carried out in El Hierro Island indicate that the observed atmospheric signal is largely correlated with topography (Bekaert et al, 2015b).…”

Section: A 5 M Resolution Digital Elevation Model (Dem) Of El Hierromentioning

confidence: 99%

Repeated magmatic intrusions at El Hierro Island following the 2011–2012 submarine eruption

Benito-Saz

Parks

Sigmundsson

et al. 2017

Journal of Volcanology and Geothermal Research

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“…Biggs et al 2009), with post-eruptive subsidence following the evacuation of magma stored in the crust (e.g. Bathke et al 2011;Parks et al 2011). However, many other processes may also cause deformation, including hydrothermal circulation (e.g.…”

Section: Remote Sensing Of Surface Deformationmentioning

confidence: 99%

Remote sensing of volcanoes and volcanic processes: integrating observation and modelling – introduction

Pyle

Mather

Biggs

2013

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Co-eruptive subsidence at Galeras identified during an InSAR survey of Colombian volcanoes (2006–2009)

Cited by 29 publications

References 63 publications

Synthesis of global satellite observations of magmatic and volcanic deformation: implications for volcano monitoring & the lateral extent of magmatic domains

Synthesis of global satellite observations of magmatic and volcanic deformation: implications for volcano monitoring & the lateral extent of magmatic domains

Repeated magmatic intrusions at El Hierro Island following the 2011–2012 submarine eruption

Remote sensing of volcanoes and volcanic processes: integrating observation and modelling – introduction

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