Mapping inflation at Santorini volcano, Greece, using GPS and InSAR
Identifieur interne : 000218 ( Istex/Corpus ); précédent : 000217; suivant : 000219Mapping inflation at Santorini volcano, Greece, using GPS and InSAR
Auteurs : I. Papoutsis ; X. Papanikolaou ; M. Floyd ; K. H. Ji ; C. Kontoes ; D. Paradissis ; V. ZacharisSource :
- Geophysical Research Letters [ 0094-8276 ] ; 2013-01-28.
English descriptors
- KwdEn :
- Caldera, Data sets, Deformation, Deformation field, Dense network, Direct comparison, Eruptive activity, February, Grid search, Horizontal components, Horizontal velocities, Insar, Insar data, Insar velocities, Intense geophysical activity, Interferometric, Interferometric time series analysis, Interferometry, January, Kameni, Modeling, Mogi, Mogi model, Mogi source, Monte carlo analysis, Nomi station, Papoutsis, Persistent scatterer interferometry, Reference area, Santorini, Santorini caldera, Santorini volcano, Shallow chamber, Small baseline subset, Source depth, Source location, Thera island, Time series, Time span, Uplift, Velocity estimates, Velocity uncertainties, Vertical components, Vertical velocities, Volcano, Volume change.
- Teeft :
- Caldera, Data sets, Deformation, Deformation field, Dense network, Direct comparison, Eruptive activity, February, Grid search, Horizontal components, Horizontal velocities, Insar, Insar data, Insar velocities, Intense geophysical activity, Interferometric, Interferometric time series analysis, Interferometry, January, Kameni, Modeling, Mogi, Mogi model, Mogi source, Monte carlo analysis, Nomi station, Papoutsis, Persistent scatterer interferometry, Reference area, Santorini, Santorini caldera, Santorini volcano, Shallow chamber, Small baseline subset, Source depth, Source location, Thera island, Time series, Time span, Uplift, Velocity estimates, Velocity uncertainties, Vertical components, Vertical velocities, Volcano, Volume change.
Abstract
Recent studies have indicated that for the first time since 1950, intense geophysical activity is occurring at the Santorini volcano. Here, we present and discuss the surface deformation associated with this activity, spanning from January 2011 to February 2012. Analysis of satellite interferometry data was performed using two well‐established techniques, namely, Persistent Scatterer Interferometry (PSI) and Small Baseline Subset (SBAS), producing dense line‐of‐sight (LOS) ground deformation maps. The displacement field was compared with GPS observations from 10 continuous sites installed on Santorini. Results show a clear and large inflation signal, up to 150 mm/yr in the LOS direction, with a radial pattern outward from the center of the caldera. We model the deformation inferred from GPS and InSAR using a Mogi source located north of the Nea Kameni island, at a depth between 3.3 km and 6.3 km and with a volume change rate in the range of 12 million m3 to 24 million m3 per year. The latest InSAR and GPS data suggest that the intense geophysical activity has started to diminish since the end of February 2012.
Deformation rates of unprecedent magnitude since January 2011 in Santorini Recent decrease in volcanic activity since end of February 2012 Modeling of the source using InSAR and GPS data.
Url:
DOI: 10.1029/2012GL054137
Links to Exploration step
ISTEX:620ED870E7D6D74CD51E4B5EA3D1A8397E147D30Le document en format XML
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Here, we present and discuss the surface deformation associated with this activity, spanning from January 2011 to February 2012. Analysis of satellite interferometry data was performed using two well‐established techniques, namely, Persistent Scatterer Interferometry (PSI) and Small Baseline Subset (SBAS), producing dense line‐of‐sight (LOS) ground deformation maps. The displacement field was compared with GPS observations from 10 continuous sites installed on Santorini. Results show a clear and large inflation signal, up to 150 mm/yr in the LOS direction, with a radial pattern outward from the center of the caldera. We model the deformation inferred from GPS and InSAR using a Mogi source located north of the Nea Kameni island, at a depth between 3.3 km and 6.3 km and with a volume change rate in the range of 12 million m3 to 24 million m3 per year. The latest InSAR and GPS data suggest that the intense geophysical activity has started to diminish since the end of February 2012.</div><div type="abstract">Deformation rates of unprecedent magnitude since January 2011 in Santorini Recent decrease in volcanic activity since end of February 2012 Modeling of the source using InSAR and GPS data.</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>insar</json:string><json:string>santorini</json:string><json:string>caldera</json:string><json:string>mogi</json:string><json:string>february</json:string><json:string>january</json:string><json:string>santorini volcano</json:string><json:string>insar data</json:string><json:string>interferometry</json:string><json:string>kameni</json:string><json:string>papoutsis</json:string><json:string>interferometric</json:string><json:string>source location</json:string><json:string>time series</json:string><json:string>deformation field</json:string><json:string>volume change</json:string><json:string>volcano</json:string><json:string>velocity uncertainties</json:string><json:string>uplift</json:string><json:string>modeling</json:string><json:string>deformation</json:string><json:string>interferometric time series analysis</json:string><json:string>mogi source</json:string><json:string>persistent scatterer interferometry</json:string><json:string>reference area</json:string><json:string>vertical components</json:string><json:string>data sets</json:string><json:string>direct comparison</json:string><json:string>insar velocities</json:string><json:string>small baseline subset</json:string><json:string>horizontal components</json:string><json:string>velocity estimates</json:string><json:string>thera island</json:string><json:string>santorini caldera</json:string><json:string>grid search</json:string><json:string>dense network</json:string><json:string>nomi station</json:string><json:string>intense geophysical activity</json:string><json:string>time span</json:string><json:string>source depth</json:string><json:string>monte carlo analysis</json:string><json:string>shallow chamber</json:string><json:string>horizontal velocities</json:string><json:string>vertical velocities</json:string><json:string>eruptive activity</json:string><json:string>mogi model</json:string></teeft></keywords><author><json:item><name>I. 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All Rights Reserved.</licence></availability><date type="published" when="2013-01-28"></date></publicationStmt><notesStmt><note type="content-type" subtype="article" source="article" scheme="https://content-type.data.istex.fr/ark:/67375/XTP-6N5SZHKN-D">article</note><note type="publication-type" subtype="journal" scheme="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</note></notesStmt><sourceDesc><biblStruct type="article"><analytic><title level="a" type="main">Mapping inflation at Santorini volcano, Greece, using GPS and InSAR</title><title level="a" type="short">DEFORMATION FIELD AT SANTORINI VOLCANO</title><author xml:id="author-0000" role="corresp"><persName><forename type="first">I.</forename><surname>Papoutsis</surname></persName><affiliation><orgName>School of Rural and Surveying Engineering</orgName><orgName>National Technical University of Athens</orgName><address><settlement type="city">Athens</settlement><country key="GR">Greece</country></address></affiliation><affiliation><orgName>Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing</orgName><orgName>National Observatory of Athens</orgName><address><settlement type="city">Athens</settlement><country key="GR">Greece</country></address></affiliation><affiliation>Corresponding author: I. Papoutsis, School of Rural and Surveying Engineering, National Technical University of Athens, Iroon Polytechniou 9, 15780 Zografou, Athens, Greece. ipapoutsis@noa.gr</affiliation></author><author xml:id="author-0001"><persName><forename type="first">X.</forename><surname>Papanikolaou</surname></persName><affiliation><orgName>School of Rural and Surveying Engineering</orgName><orgName>National Technical University of Athens</orgName><address><settlement type="city">Athens</settlement><country key="GR">Greece</country></address></affiliation></author><author xml:id="author-0002"><persName><forename type="first">M.</forename><surname>Floyd</surname></persName><affiliation><orgName>Department of Earth, Atmospheric and Planetary Sciences</orgName><orgName>Massachusetts Institute of Technology</orgName><address><settlement type="city">Cambridge</settlement><region>Massachusetts</region><country key="US">USA</country></address></affiliation></author><author xml:id="author-0003"><persName><forename type="first">K. H.</forename><surname>Ji</surname></persName><affiliation><orgName>Department of Earth, Atmospheric and Planetary Sciences</orgName><orgName>Massachusetts Institute of Technology</orgName><address><settlement type="city">Cambridge</settlement><region>Massachusetts</region><country key="US">USA</country></address></affiliation></author><author xml:id="author-0004"><persName><forename type="first">C.</forename><surname>Kontoes</surname></persName><affiliation><orgName>Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing</orgName><orgName>National Observatory of Athens</orgName><address><settlement type="city">Athens</settlement><country key="GR">Greece</country></address></affiliation></author><author xml:id="author-0005"><persName><forename type="first">D.</forename><surname>Paradissis</surname></persName><affiliation><orgName>School of Rural and Surveying Engineering</orgName><orgName>National Technical University of Athens</orgName><address><settlement type="city">Athens</settlement><country key="GR">Greece</country></address></affiliation></author><author xml:id="author-0006"><persName><forename type="first">V.</forename><surname>Zacharis</surname></persName><affiliation><orgName>School of Rural and Surveying Engineering</orgName><orgName>National Technical University of Athens</orgName><address><settlement type="city">Athens</settlement><country key="GR">Greece</country></address></affiliation></author><idno type="istex">620ED870E7D6D74CD51E4B5EA3D1A8397E147D30</idno><idno type="DOI">10.1029/2012GL054137</idno><idno type="unit">GRL50066</idno><idno type="toTypesetVersion">file:GRL.GRL50066.pdf</idno></analytic><monogr><title level="j" type="main">Geophysical Research Letters</title><title level="j" type="alt">GEOPHYSICAL RESEARCH LETTERS</title><idno type="pISSN">0094-8276</idno><idno type="eISSN">1944-8007</idno><idno type="book-DOI">10.1002/(ISSN)1944-8007</idno><idno type="book-part-DOI">10.1002/grl.v40.2</idno><idno type="product">GRL</idno><imprint><biblScope unit="vol">40</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="267">267</biblScope><biblScope unit="page" to="272">272</biblScope><biblScope unit="page-count">6</biblScope><date type="published" when="2013-01-28"></date></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><abstract style="main"><p xml:id="grl50066-para-0002">Recent studies have indicated that for the first time since 1950, intense geophysical activity is occurring at the Santorini volcano. Here, we present and discuss the surface deformation associated with this activity, spanning from January 2011 to February 2012. Analysis of satellite interferometry data was performed using two well‐established techniques, namely, Persistent Scatterer Interferometry (PSI) and Small Baseline Subset (SBAS), producing dense line‐of‐sight (LOS) ground deformation maps. The displacement field was compared with GPS observations from 10 continuous sites installed on Santorini. Results show a clear and large inflation signal, up to 150 mm/yr in the LOS direction, with a radial pattern outward from the center of the caldera. We model the deformation inferred from GPS and InSAR using a Mogi source located north of the Nea Kameni island, at a depth between 3.3 km and 6.3 km and with a volume change rate in the range of 12 million m<hi rend="superscript">3</hi> to 24 million m<hi rend="superscript">3</hi> per year. The latest InSAR and GPS data suggest that the intense geophysical activity has started to diminish since the end of February 2012.</p></abstract><abstract style="short"><head>Key Points</head><p><list style="bulleted"><item>Deformation rates of unprecedent magnitude since January 2011 in Santorini</item><item>Recent decrease in volcanic activity since end of February 2012</item><item>Modeling of the source using InSAR and GPS data.</item></list></p></abstract><textClass><keywords><term xml:id="grl50066-kwd-0001">Santorini</term><term xml:id="grl50066-kwd-0002">SBAS</term><term xml:id="grl50066-kwd-0003">PSI</term><term xml:id="grl50066-kwd-0004">GPS</term><term xml:id="grl50066-kwd-0005">Inflation</term></keywords><classCode scheme="http://psi.agu.org/taxonomy5/1200">GEODESY AND GRAVITY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</classCode><classCode scheme="http://psi.agu.org/taxonomy5/6900">RADIO SCIENCE</classCode><classCode scheme="http://psi.agu.org/taxonomy5/7200">SEISMOLOGY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</classCode><classCode scheme="articleCategory">Regular Article</classCode><classCode scheme="tocHeading1">Regular Articles</classCode></textClass><langUsage><language ident="EN"></language></langUsage></profileDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/620ED870E7D6D74CD51E4B5EA3D1A8397E147D30/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:lang="en" xml:id="grl50066"><header><publicationMeta level="product"><doi>10.1002/(ISSN)1944-8007</doi><issn type="print">0094-8276</issn><issn type="electronic">1944-8007</issn><idGroup><id type="product" value="GRL"></id></idGroup><titleGroup><title type="main" sort="GEOPHYSICAL RESEARCH LETTERS">Geophysical Research Letters</title><title type="short">Geophys. Res. Lett.</title></titleGroup></publicationMeta><publicationMeta level="part" position="20"><doi>10.1002/grl.v40.2</doi><copyright>©2013. American Geophysical Union. All Rights Reserved.</copyright><numberingGroup><numbering type="journalVolume" number="40">40</numbering><numbering type="journalIssue">2</numbering></numberingGroup><coverDate startDate="2013-01-28">28 January 2013</coverDate></publicationMeta><publicationMeta level="unit" position="70" type="article" status="forIssue"><doi>10.1029/2012GL054137</doi><idGroup><id type="unit" value="GRL50066"></id></idGroup><countGroup><count type="pageTotal" number="6"></count></countGroup><titleGroup><title type="articleCategory">Regular Article</title><title type="tocHeading1">Regular Articles</title></titleGroup><copyright>©2012. American Geophysical Union. All Rights Reserved.</copyright><eventGroup><event type="manuscriptAccepted" date="2012-12-05"></event><event type="manuscriptReceived" date="2012-10-07"></event><event type="manuscriptRevised" date="2012-12-01"></event><event type="xmlCreated" agent="SPi Global" date="2012-12-27"></event><event type="publishedOnlineEarlyUnpaginated" date="2013-01-26"></event><event type="firstOnline" date="2013-01-26"></event><event type="publishedOnlineFinalForm" date="2013-03-03"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-26"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.6.4 mode:FullText" date="2015-10-01"></event></eventGroup><numberingGroup><numbering type="pageFirst">267</numbering><numbering type="pageLast">272</numbering></numberingGroup><correspondenceTo>Corresponding author: I. Papoutsis, School of Rural and Surveying Engineering, National Technical University of Athens, Iroon Polytechniou 9, 15780 Zografou, Athens, Greece. <email>ipapoutsis@noa.gr</email></correspondenceTo><subjectInfo><subject href="http://psi.agu.org/taxonomy5/1200">GEODESY AND GRAVITY</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/1209">Tectonic deformation</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/1207">Transient deformation</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/1209">Tectonic deformation</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/1242">Seismic cycle related deformations</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4337">Remote sensing and disasters</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4302">Geological</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/6900">RADIO SCIENCE</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/6924">Interferometry</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/6924">Interferometry</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/7200">SEISMOLOGY</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/7280">Volcano seismology</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/8485">Remote sensing of volcanoes</subject><subject href="http://psi.agu.org/taxonomy5/8419">Volcano monitoring</subject></subjectInfo></subjectInfo><selfCitationGroup><citation xml:id="grl50066-cit-0022" type="self"><author><familyName>Papoutsis</familyName>,
<givenNames>I.</givenNames></author>,
<author><givenNames>X.</givenNames>
<familyName>Papanikolaou</familyName></author>,
<author><givenNames>M.</givenNames>
<familyName>Floyd</familyName></author>,
<author><givenNames>K. H.</givenNames>
<familyName>Ji</familyName></author>,
<author><givenNames>C.</givenNames>
<familyName>Kontoes</familyName></author>,
<author><givenNames>D.</givenNames>
<familyName>Paradissis</familyName></author>, and
<author><givenNames>V.</givenNames>
<familyName>Zacharis</familyName></author> (<pubYear year="2013">2013</pubYear>), <articleTitle>Mapping inflation at Santorini volcano, Greece, using GPS and InSAR</articleTitle>, <journalTitle>Geophys. Res. Lett.</journalTitle>, <vol>40</vol>, <pageFirst>267</pageFirst>–<pageLast>272</pageLast>, doi:<accessionId ref="info:doi/10.1029/2012GL054137">10.1029/2012GL054137</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:GRL.GRL50066.pdf"></link></linkGroup></publicationMeta><contentMeta><titleGroup><title type="main">Mapping inflation at Santorini volcano, Greece, using GPS and InSAR</title><title type="short">DEFORMATION FIELD AT SANTORINI VOLCANO</title><title type="shortAuthors">PAPOUTSIS ET AL.</title></titleGroup><creators><creator creatorRole="author" xml:id="grl50066-cr-0001" affiliationRef="#grl50066-aff-0001 #grl50066-aff-0002" corresponding="yes"><personName><givenNames>I.</givenNames><familyName>Papoutsis</familyName></personName></creator><creator creatorRole="author" xml:id="grl50066-cr-0002" affiliationRef="#grl50066-aff-0001"><personName><givenNames>X.</givenNames><familyName>Papanikolaou</familyName></personName></creator><creator creatorRole="author" xml:id="grl50066-cr-0003" affiliationRef="#grl50066-aff-0003"><personName><givenNames>M.</givenNames><familyName>Floyd</familyName></personName></creator><creator creatorRole="author" xml:id="grl50066-cr-0004" affiliationRef="#grl50066-aff-0003"><personName><givenNames>K. H.</givenNames><familyName>Ji</familyName></personName></creator><creator creatorRole="author" xml:id="grl50066-cr-0005" affiliationRef="#grl50066-aff-0002"><personName><givenNames>C.</givenNames><familyName>Kontoes</familyName></personName></creator><creator creatorRole="author" xml:id="grl50066-cr-0006" affiliationRef="#grl50066-aff-0001"><personName><givenNames>D.</givenNames><familyName>Paradissis</familyName></personName></creator><creator creatorRole="author" xml:id="grl50066-cr-0007" affiliationRef="#grl50066-aff-0001"><personName><givenNames>V.</givenNames><familyName>Zacharis</familyName></personName></creator></creators><affiliationGroup><affiliation countryCode="GR" type="organization" xml:id="grl50066-aff-0001"><orgDiv>School of Rural and Surveying Engineering</orgDiv><orgName>National Technical University of Athens</orgName><address><city>Athens</city><country>Greece</country></address></affiliation><affiliation countryCode="GR" type="organization" xml:id="grl50066-aff-0002"><orgDiv>Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing</orgDiv><orgName>National Observatory of Athens</orgName><address><city>Athens</city><country>Greece</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="grl50066-aff-0003"><orgDiv>Department of Earth, Atmospheric and Planetary Sciences</orgDiv><orgName>Massachusetts Institute of Technology</orgName><address><city>Cambridge</city><countryPart>Massachusetts</countryPart><country>USA</country></address></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="grl50066-kwd-0001">Santorini</keyword><keyword xml:id="grl50066-kwd-0002">SBAS</keyword><keyword xml:id="grl50066-kwd-0003">PSI</keyword><keyword xml:id="grl50066-kwd-0004">GPS</keyword><keyword xml:id="grl50066-kwd-0005">Inflation</keyword></keywordGroup><supportingInformation xml:id="grl50066-supinf-0001"><p xml:id="grl50066-para-0001">Supporting information may be found in the online version of this article.</p><supportingInfoItem xml:id="grl50066-supitem-0001"><mediaResource mimeType="text/plain" rendition="webOriginal" alt="supplementary data" href="urn-x:wiley:00948276:media:grl50066:README"></mediaResource><caption>Supporting information</caption></supportingInfoItem><supportingInfoItem xml:id="grl50066-supitem-0002"><mediaResource mimeType="application/pdf" rendition="webOriginal" alt="supplementary data" href="urn-x:wiley:00948276:media:grl50066:Supplementary_material"></mediaResource><caption>Supporting information</caption></supportingInfoItem></supportingInformation><abstractGroup><abstract type="main"><p xml:id="grl50066-para-0002" label="1">Recent studies have indicated that for the first time since 1950, intense geophysical activity is occurring at the Santorini volcano. Here, we present and discuss the surface deformation associated with this activity, spanning from January 2011 to February 2012. Analysis of satellite interferometry data was performed using two well‐established techniques, namely, Persistent Scatterer Interferometry (PSI) and Small Baseline Subset (SBAS), producing dense line‐of‐sight (LOS) ground deformation maps. The displacement field was compared with GPS observations from 10 continuous sites installed on Santorini. Results show a clear and large inflation signal, up to 150 mm/yr in the LOS direction, with a radial pattern outward from the center of the caldera. We model the deformation inferred from GPS and InSAR using a Mogi source located north of the Nea Kameni island, at a depth between 3.3 km and 6.3 km and with a volume change rate in the range of 12 million m<sup>3</sup> to 24 million m<sup>3</sup> per year. The latest InSAR and GPS data suggest that the intense geophysical activity has started to diminish since the end of February 2012.</p></abstract><abstract type="short"><title type="main">Key Points</title><p><list style="bulleted"><listItem>Deformation rates of unprecedent magnitude since January 2011 in Santorini</listItem><listItem>Recent decrease in volcanic activity since end of February 2012</listItem><listItem>Modeling of the source using InSAR and GPS data.</listItem></list></p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Mapping inflation at Santorini volcano, Greece, using GPS and InSAR</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>DEFORMATION FIELD AT SANTORINI VOLCANO</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Mapping inflation at Santorini volcano, Greece, using GPS and InSAR</title></titleInfo><name type="personal"><namePart type="given">I.</namePart><namePart type="family">Papoutsis</namePart><affiliation>School of Rural and Surveying Engineering, National Technical University of Athens, Athens, Greece</affiliation><affiliation>Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens, Greece</affiliation><affiliation>E-mail: ipapoutsis@noa.gr</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">X.</namePart><namePart type="family">Papanikolaou</namePart><affiliation>School of Rural and Surveying Engineering, National Technical University of Athens, Athens, Greece</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Floyd</namePart><affiliation>Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Massachusetts, Cambridge, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K. H.</namePart><namePart type="family">Ji</namePart><affiliation>Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Massachusetts, Cambridge, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Kontoes</namePart><affiliation>Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens, Greece</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Paradissis</namePart><affiliation>School of Rural and Surveying Engineering, National Technical University of Athens, Athens, Greece</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V.</namePart><namePart type="family">Zacharis</namePart><affiliation>School of Rural and Surveying Engineering, National Technical University of Athens, Athens, Greece</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">2013-01-28</dateIssued><dateCreated encoding="w3cdtf">2012-12-27</dateCreated><dateCaptured encoding="w3cdtf">2012-10-07</dateCaptured><dateValid encoding="w3cdtf">2012-12-05</dateValid><edition>Papoutsis, I., X. Papanikolaou, M. Floyd, K. H. Ji, C. Kontoes, D. Paradissis, and V. Zacharis (2013), Mapping inflation at Santorini volcano, Greece, using GPS and InSAR, Geophys. Res. Lett., 40, 267–272, doi:10.1029/2012GL054137.</edition><copyrightDate encoding="w3cdtf">2013</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract>Recent studies have indicated that for the first time since 1950, intense geophysical activity is occurring at the Santorini volcano. Here, we present and discuss the surface deformation associated with this activity, spanning from January 2011 to February 2012. Analysis of satellite interferometry data was performed using two well‐established techniques, namely, Persistent Scatterer Interferometry (PSI) and Small Baseline Subset (SBAS), producing dense line‐of‐sight (LOS) ground deformation maps. The displacement field was compared with GPS observations from 10 continuous sites installed on Santorini. Results show a clear and large inflation signal, up to 150 mm/yr in the LOS direction, with a radial pattern outward from the center of the caldera. We model the deformation inferred from GPS and InSAR using a Mogi source located north of the Nea Kameni island, at a depth between 3.3 km and 6.3 km and with a volume change rate in the range of 12 million m3 to 24 million m3 per year. The latest InSAR and GPS data suggest that the intense geophysical activity has started to diminish since the end of February 2012.</abstract><abstract type="short">Deformation rates of unprecedent magnitude since January 2011 in Santorini Recent decrease in volcanic activity since end of February 2012 Modeling of the source using InSAR and GPS data.</abstract><subject><genre>keywords</genre><topic>Santorini</topic><topic>SBAS</topic><topic>PSI</topic><topic>GPS</topic><topic>Inflation</topic></subject><relatedItem type="host"><titleInfo><title>Geophysical Research Letters</title></titleInfo><titleInfo type="abbreviated"><title>Geophys. Res. Lett.</title></titleInfo><genre type="journal">journal</genre><note type="content"> Supporting information may be found in the online version of this article.Supporting Info Item: Supporting information - Supporting information - </note><subject><genre>index-terms</genre><topic authorityURI="http://psi.agu.org/taxonomy5/1200">GEODESY AND GRAVITY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1209">Tectonic deformation</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1207">Transient deformation</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1209">Tectonic deformation</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1242">Seismic cycle related deformations</topic><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/taxonomy5/4302">Geological</topic><topic authorityURI="http://psi.agu.org/taxonomy5/6900">RADIO SCIENCE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/6924">Interferometry</topic><topic authorityURI="http://psi.agu.org/taxonomy5/6924">Interferometry</topic><topic authorityURI="http://psi.agu.org/taxonomy5/7200">SEISMOLOGY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/7280">Volcano seismology</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8485">Remote sensing of volcanoes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8419">Volcano monitoring</topic></subject><subject><genre>article-category</genre><topic>Regular Article</topic></subject><identifier type="ISSN">0094-8276</identifier><identifier type="eISSN">1944-8007</identifier><identifier type="DOI">10.1002/(ISSN)1944-8007</identifier><identifier type="PublisherID">GRL</identifier><part><date>2013</date><detail type="volume"><caption>vol.</caption><number>40</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>267</start><end>272</end><total>6</total></extent></part></relatedItem><identifier type="istex">620ED870E7D6D74CD51E4B5EA3D1A8397E147D30</identifier><identifier type="DOI">10.1029/2012GL054137</identifier><identifier type="ArticleID">GRL50066</identifier><accessCondition type="use and reproduction" contentType="copyright">©2013. 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