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Duration, magnitude, and frequency of subaerial volcano deformation events: New results from Latin America using InSAR and a global synthesis

Identifieur interne : 000077 ( Main/Exploration ); précédent : 000076; suivant : 000078

Duration, magnitude, and frequency of subaerial volcano deformation events: New results from Latin America using InSAR and a global synthesis

Auteurs : T. J. Fournier [États-Unis] ; M. E. Pritchard [États-Unis] ; S. N. Riddick [États-Unis]

Source :

RBID : ISTEX:5BB048CF0B7CF31E4EAAB6DC8C469878D5AF7120

Descripteurs français

English descriptors

Abstract

We combine new observations of volcano deformation in Latin America with more than 100 previous deformation studies in other areas of the world to constrain the frequency, magnitude, and duration of subaerial volcano deformation events. We discuss implications for eruptive hazards from a given deformation event and the optimum repeat interval for proposed InSAR satellite missions. We use L band (23.6 cm wavelength) satellite‐based interferometric synthetic aperture radar (InSAR) to make the first systematic search for deformation in all volcanic arcs of Latin America (including Mexico, Central America, the Caribbean, and the northern and southern Andes), spanning 2006–2008. We combine L and C band (5.6 cm wavelength) InSAR observations over the southern Andes volcanoes to extend the time series from 2002 to 2008 and assess the capabilities of the different radars: L band gives superior results in highly vegetated areas. Our observations reveal 11 areas of volcano deformation, some of them in areas that were thought to be dormant. There is a lack of observed deformation at several erupting volcanoes, probably due to temporal aliasing. The total number of deforming volcanoes in the central and southern Andes now totals 15 (from observations between 1992 and 2008), comparable to the Alaska/Aleutian arc. Globally, volcanoes deform across a variety of time scales (from seconds to centuries) often without eruption and with no apparent critical observation time scale, although observations made every minute are sometimes necessary to see precursors to eruption.

Url:
DOI: 10.1029/2009GC002558


Affiliations:


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Le document en format XML

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<term>Active volcanoes</term>
<term>Aliased</term>
<term>Alos</term>
<term>Alos data</term>
<term>Alos interferogram</term>
<term>Amelung</term>
<term>Andes</term>
<term>Aperture radar</term>
<term>April</term>
<term>August</term>
<term>Augustine volcano</term>
<term>Austral</term>
<term>Austral andes</term>
<term>Austral summer</term>
<term>Band coherence</term>
<term>Band data</term>
<term>Band observations</term>
<term>Baseline</term>
<term>Biggs</term>
<term>Black line</term>
<term>Caldera</term>
<term>Caulle</term>
<term>Central america</term>
<term>Central andes</term>
<term>Cerro</term>
<term>Cerro hudson</term>
<term>Cervelli</term>
<term>Chaiten</term>
<term>Chile</term>
<term>Coeruptive</term>
<term>Coeruptive deformation</term>
<term>Coherence</term>
<term>Copahue</term>
<term>Crustal</term>
<term>Crustal deformation</term>
<term>Data quality</term>
<term>December</term>
<term>Decorrelation</term>
<term>Deformation</term>
<term>Deformation event</term>
<term>Deformation field</term>
<term>Deformation observations</term>
<term>Deformation pattern</term>
<term>Deformation precursors</term>
<term>Deformation rate</term>
<term>Deformation source</term>
<term>Deforming</term>
<term>Deforming volcanoes</term>
<term>Different volcanoes</term>
<term>Dike</term>
<term>Dvorak</term>
<term>Dzurisin</term>
<term>Earth planet</term>
<term>East flank</term>
<term>Ecuador</term>
<term>Envisat</term>
<term>Envisat data</term>
<term>Eruption</term>
<term>Eruptive</term>
<term>February</term>
<term>Flank</term>
<term>Fournier</term>
<term>Geochemistry</term>
<term>Geochemistry geophysics geosystems</term>
<term>Geodetic</term>
<term>Geol</term>
<term>Geophys</term>
<term>Geophysics</term>
<term>Geosystems</term>
<term>Geotherm</term>
<term>Global</term>
<term>Global compilation</term>
<term>Global synthesis</term>
<term>Global volcanism report</term>
<term>Ground deformation</term>
<term>Hydrothermal</term>
<term>Hydrothermal activity</term>
<term>Insar</term>
<term>Insar observations</term>
<term>Interferogram</term>
<term>Interferograms</term>
<term>Interferometric</term>
<term>Interferometry</term>
<term>Ionospheric</term>
<term>Ionospheric effects</term>
<term>Ionospheric origin</term>
<term>January</term>
<term>Kamchatka</term>
<term>Kilauea</term>
<term>Kilauea volcano</term>
<term>Lara</term>
<term>Large baseline</term>
<term>Latin america</term>
<term>Lava</term>
<term>Lava flow</term>
<term>Lava flows</term>
<term>Lett</term>
<term>Lisowski</term>
<term>Llaima</term>
<term>Local time</term>
<term>Long valley</term>
<term>Long valley caldera</term>
<term>Lonquimay</term>
<term>Lonquimay volcano</term>
<term>Magma</term>
<term>Magma chamber</term>
<term>Magma intrusion</term>
<term>Magmatic</term>
<term>Masterlark</term>
<term>Maule</term>
<term>Model prediction</term>
<term>Modeling</term>
<term>Mogi</term>
<term>Northern andes</term>
<term>Okmok</term>
<term>Okmok volcano</term>
<term>Perpendicular baseline</term>
<term>Personal communication</term>
<term>Phase change</term>
<term>Precursor</term>
<term>Precursory</term>
<term>Precursory deformation</term>
<term>Pritchard</term>
<term>Radar interferometry</term>
<term>Residual</term>
<term>Satellite radar interferometry</term>
<term>Segall</term>
<term>Seismic</term>
<term>Several areas</term>
<term>Several interferograms</term>
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<term>Smithsonian institution</term>
<term>Soufriere hills volcano</term>
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<term>Southern chile</term>
<term>Subaerial volcano deformation events</term>
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<term>Suppl</term>
<term>Surface deformation</term>
<term>Temporal aliasing</term>
<term>Time scale</term>
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<term>Time series</term>
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<term>Volcanic activity</term>
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<term>Volcanic deformation</term>
<term>Volcanism</term>
<term>Volcano</term>
<term>Volcano deformation</term>
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<term>Alos</term>
<term>Alos data</term>
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<term>Amelung</term>
<term>Andes</term>
<term>Aperture radar</term>
<term>April</term>
<term>August</term>
<term>Augustine volcano</term>
<term>Austral</term>
<term>Austral andes</term>
<term>Austral summer</term>
<term>Band coherence</term>
<term>Band data</term>
<term>Band observations</term>
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<term>Black line</term>
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<term>Chaiten</term>
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<term>Coeruptive deformation</term>
<term>Coherence</term>
<term>Copahue</term>
<term>Crustal</term>
<term>Crustal deformation</term>
<term>Data quality</term>
<term>December</term>
<term>Decorrelation</term>
<term>Deformation</term>
<term>Deformation event</term>
<term>Deformation field</term>
<term>Deformation observations</term>
<term>Deformation pattern</term>
<term>Deformation precursors</term>
<term>Deformation rate</term>
<term>Deformation source</term>
<term>Deforming</term>
<term>Deforming volcanoes</term>
<term>Different volcanoes</term>
<term>Dike</term>
<term>Dvorak</term>
<term>Dzurisin</term>
<term>Earth planet</term>
<term>East flank</term>
<term>Ecuador</term>
<term>Envisat</term>
<term>Envisat data</term>
<term>Eruption</term>
<term>Eruptive</term>
<term>February</term>
<term>Flank</term>
<term>Fournier</term>
<term>Geochemistry</term>
<term>Geochemistry geophysics geosystems</term>
<term>Geodetic</term>
<term>Geol</term>
<term>Geophys</term>
<term>Geophysics</term>
<term>Geosystems</term>
<term>Geotherm</term>
<term>Global</term>
<term>Global compilation</term>
<term>Global synthesis</term>
<term>Global volcanism report</term>
<term>Ground deformation</term>
<term>Hydrothermal</term>
<term>Hydrothermal activity</term>
<term>Insar</term>
<term>Insar observations</term>
<term>Interferogram</term>
<term>Interferograms</term>
<term>Interferometric</term>
<term>Interferometry</term>
<term>Ionospheric</term>
<term>Ionospheric effects</term>
<term>Ionospheric origin</term>
<term>January</term>
<term>Kamchatka</term>
<term>Kilauea</term>
<term>Kilauea volcano</term>
<term>Lara</term>
<term>Large baseline</term>
<term>Latin america</term>
<term>Lava</term>
<term>Lava flow</term>
<term>Lava flows</term>
<term>Lett</term>
<term>Lisowski</term>
<term>Llaima</term>
<term>Local time</term>
<term>Long valley</term>
<term>Long valley caldera</term>
<term>Lonquimay</term>
<term>Lonquimay volcano</term>
<term>Magma</term>
<term>Magma chamber</term>
<term>Magma intrusion</term>
<term>Magmatic</term>
<term>Masterlark</term>
<term>Maule</term>
<term>Model prediction</term>
<term>Modeling</term>
<term>Mogi</term>
<term>Northern andes</term>
<term>Okmok</term>
<term>Okmok volcano</term>
<term>Perpendicular baseline</term>
<term>Personal communication</term>
<term>Phase change</term>
<term>Precursor</term>
<term>Precursory</term>
<term>Precursory deformation</term>
<term>Pritchard</term>
<term>Radar interferometry</term>
<term>Residual</term>
<term>Satellite radar interferometry</term>
<term>Segall</term>
<term>Seismic</term>
<term>Several areas</term>
<term>Several interferograms</term>
<term>Smithsonian</term>
<term>Smithsonian institution</term>
<term>Soufriere hills volcano</term>
<term>Southern andes</term>
<term>Southern chile</term>
<term>Subaerial volcano deformation events</term>
<term>Subsidence</term>
<term>Suppl</term>
<term>Surface deformation</term>
<term>Temporal aliasing</term>
<term>Time scale</term>
<term>Time scales</term>
<term>Time series</term>
<term>Trans</term>
<term>Updip edge</term>
<term>Uplift</term>
<term>Vegetated</term>
<term>Vegetated areas</term>
<term>Volcanic</term>
<term>Volcanic activity</term>
<term>Volcanic arcs</term>
<term>Volcanic deformation</term>
<term>Volcanism</term>
<term>Volcano</term>
<term>Volcano deformation</term>
<term>Volcano deformation events</term>
<term>Volcano deformation figure</term>
<term>Volcanol</term>
<term>Wadge</term>
<term>Zebker</term>
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<front>
<div type="abstract">We combine new observations of volcano deformation in Latin America with more than 100 previous deformation studies in other areas of the world to constrain the frequency, magnitude, and duration of subaerial volcano deformation events. We discuss implications for eruptive hazards from a given deformation event and the optimum repeat interval for proposed InSAR satellite missions. We use L band (23.6 cm wavelength) satellite‐based interferometric synthetic aperture radar (InSAR) to make the first systematic search for deformation in all volcanic arcs of Latin America (including Mexico, Central America, the Caribbean, and the northern and southern Andes), spanning 2006–2008. We combine L and C band (5.6 cm wavelength) InSAR observations over the southern Andes volcanoes to extend the time series from 2002 to 2008 and assess the capabilities of the different radars: L band gives superior results in highly vegetated areas. Our observations reveal 11 areas of volcano deformation, some of them in areas that were thought to be dormant. There is a lack of observed deformation at several erupting volcanoes, probably due to temporal aliasing. The total number of deforming volcanoes in the central and southern Andes now totals 15 (from observations between 1992 and 2008), comparable to the Alaska/Aleutian arc. Globally, volcanoes deform across a variety of time scales (from seconds to centuries) often without eruption and with no apparent critical observation time scale, although observations made every minute are sometimes necessary to see precursors to eruption.</div>
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