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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 : 000414 ( Istex/Corpus ); précédent : 000413; suivant : 000415

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

Auteurs : T. J. Fournier ; M. E. Pritchard ; S. N. Riddick

Source :

RBID : ISTEX:5BB048CF0B7CF31E4EAAB6DC8C469878D5AF7120

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

Links to Exploration step

ISTEX:5BB048CF0B7CF31E4EAAB6DC8C469878D5AF7120

Le document en format XML

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<term>Several interferograms</term>
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<term>Smithsonian institution</term>
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<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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<namePart type="family">Riddick</namePart>
<affiliation>Department of Earth and Atmospheric Sciences, Cornell University, Snee Hall,, New York, 14853, Ithaca, USA</affiliation>
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<dateIssued encoding="w3cdtf">2010-01</dateIssued>
<dateCaptured encoding="w3cdtf">2009-04-15</dateCaptured>
<dateValid encoding="w3cdtf">2009-11-13</dateValid>
<edition>Fournier, T. J., M. E. Pritchard, and S. N. Riddick (2010), Duration, magnitude, and frequency of subaerial volcano deformation events: New results from Latin America using InSAR and a global synthesis, Geochem. Geophys. Geosyst., 11, Q01003, doi:10.1029/2009GC002558.</edition>
<copyrightDate encoding="w3cdtf">2010</copyrightDate>
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<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
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<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.</abstract>
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<genre>keywords</genre>
<topic>InSAR</topic>
<topic>Andes</topic>
<topic>volcano</topic>
<topic>Caribbean</topic>
<topic>Central America</topic>
<topic>deformation</topic>
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<title>Geochemistry, Geophysics, Geosystems</title>
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<title>Geochem. Geophys. Geosyst.</title>
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<note type="content"> Auxiliary material for this article contains four tables. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). See Plugins for a list of applications and supported file formats. Additional file information is provided in the readme.txt. Auxiliary material for this article contains four tables. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). See Plugins for a list of applications and supported file formats. Additional file information is provided in the readme.txt. Auxiliary material for this article contains four tables. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). See Plugins for a list of applications and supported file formats. Additional file information is provided in the readme.txt. Auxiliary material for this article contains four tables. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). See Plugins for a list of applications and supported file formats. Additional file information is provided in the readme.txt.Supporting Info Item: readme.txt - Table S1. SAR data from the ALOS and Envisat satellites that we used to look at volcanoes in the Southern Andes Volcanic Arc arranged by volcano. - Table S2. SAR data from the ALOS satellite that we used to look at volcanoes in the Northern Andes Volcanic Arc arranged by orbital path. - Table S3. SAR data from the ALOS satellite that we used to look at volcanoes in the Central American Arc arranged by orbital path. - Table S4. SAR data from the ALOS satellite that we used to look at volcanoes in the Caribbean Arc arranged by orbital path. - Tab‐delimited Table 1. - Tab‐delimited Table 2. - Tab‐delimited Table 3. - </note>
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<topic authorityURI="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/4337">Remote sensing and disasters</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/8485">Remote sensing of volcanoes</topic>
</subject>
<identifier type="ISSN">1525-2027</identifier>
<identifier type="eISSN">1525-2027</identifier>
<identifier type="DOI">10.1002/(ISSN)1525-2027</identifier>
<identifier type="CODEN">GGGGFR</identifier>
<identifier type="PublisherID">GGGE</identifier>
<part>
<date>2010</date>
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<caption>vol.</caption>
<number>11</number>
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<number>1</number>
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<identifier type="DOI">10.1029/2009GC002558</identifier>
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<accessCondition type="use and reproduction" contentType="copyright">Copyright 2010 by the American Geophysical Union.</accessCondition>
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