Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece
Identifieur interne : 000015 ( Istex/Corpus ); précédent : 000014; suivant : 000016Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece
Auteurs : Joachim Gottsmann ; Roberto Carniel ; Nicolas Coppo ; Luke Wooller ; Stefanie Hautmann ; Hazel RymerSource :
- Geophysical Research Letters [ 0094-8276 ] ; 2007-04.
English descriptors
- KwdEn :
- Aqueous fluid migration, Average amplitudes, Bouguer density, Caldera, Caldera floor, Caldera unrest, Caldera volcanoes, Caliro, Campi flegrei, Campi flegrei caldera, Continuous gravity, Data sets, Degassing, Degassing process, Delay time, Discrete bursts, Dominant period, Dzurisin, Earth planet, Earth sciences, Electrical properties, Electromagnetic signal, Fluid flow, Fluid migration, Geophys, Geophysical, Geophysical signals, Geotherm, Gottsmann, Gravimetric, Gravimetric record, Gravity, Gravity changes, Gravity data, Gravity increase, Gravity record, Gravity variations, Ground deformation, Ground subsidence, Hydrothermal, Hydrothermal system, Hydrothermal systems, Lett, Many cases, Milton keynes, Multiparameter insights, Nisyros, Nisyros caldera, Nisyros island, Nisyros volcano, Open university, Oscillation, Periodic oscillation, Periodic oscillations, Periodic unrest, Phreatic crater, Poor satellite coverage, Power spectrum, Record displays, Residual gravity changes, Restless caldera, Restless calderas, Same location, Seismic, Seismic intensity, Seismic record, Shallow depth, Source depth, Subsurface dynamics, Teleseismic events, Unrest, Unrest periods, Upper geyser basin, Volcano, Volcano geodesy, Volcanol, Yellowstone caldera.
- Teeft :
- Aqueous fluid migration, Average amplitudes, Bouguer density, Caldera, Caldera floor, Caldera unrest, Caldera volcanoes, Caliro, Campi flegrei, Campi flegrei caldera, Continuous gravity, Data sets, Degassing, Degassing process, Delay time, Discrete bursts, Dominant period, Dzurisin, Earth planet, Earth sciences, Electrical properties, Electromagnetic signal, Fluid flow, Fluid migration, Geophys, Geophysical, Geophysical signals, Geotherm, Gottsmann, Gravimetric, Gravimetric record, Gravity, Gravity changes, Gravity data, Gravity increase, Gravity record, Gravity variations, Ground deformation, Ground subsidence, Hydrothermal, Hydrothermal system, Hydrothermal systems, Lett, Many cases, Milton keynes, Multiparameter insights, Nisyros, Nisyros caldera, Nisyros island, Nisyros volcano, Open university, Oscillation, Periodic oscillation, Periodic oscillations, Periodic unrest, Phreatic crater, Poor satellite coverage, Power spectrum, Record displays, Residual gravity changes, Restless caldera, Restless calderas, Same location, Seismic, Seismic intensity, Seismic record, Shallow depth, Source depth, Subsurface dynamics, Teleseismic events, Unrest, Unrest periods, Upper geyser basin, Volcano, Volcano geodesy, Volcanol, Yellowstone caldera.
Abstract
Unrest at collapse calderas is generally thought to be triggered by the arrival of new magma at shallow depth. But few unrest periods at calderas over the past decades have culminated in volcanic eruptions and the role of hydrothermal processes during unrest is drawing more and more attention. Here we report joint and simultaneous continuous multi‐parameter observations made at the restless Nisyros caldera (Greece), which reveal non‐steady short‐term oscillatory signals. The combined geodetic, gravimetric, seismic and electromagnetic records indicate that the oscillations are associated with thermohydromechanical disturbances of the hydrothermal system. The dominant period of oscillation (40–60 min) indicates short‐term processes most likely associated with instabilities in the degassing process. Amplitudes of recorded geodetic and gravimetric signals are comparable to amplitudes observed at other periodically restless calderas. We conclude that shallow aqueous fluid migration can contribute significantly to periodic unrest, explaining the lack of eruptions in many cases of unrest.
Url:
DOI: 10.1029/2007GL029594
Links to Exploration step
ISTEX:76D5ADA5DA8F5DA673FF15010F26CDCD507D7333Le document en format XML
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But few unrest periods at calderas over the past decades have culminated in volcanic eruptions and the role of hydrothermal processes during unrest is drawing more and more attention. Here we report joint and simultaneous continuous multi‐parameter observations made at the restless Nisyros caldera (Greece), which reveal non‐steady short‐term oscillatory signals. The combined geodetic, gravimetric, seismic and electromagnetic records indicate that the oscillations are associated with thermohydromechanical disturbances of the hydrothermal system. The dominant period of oscillation (40–60 min) indicates short‐term processes most likely associated with instabilities in the degassing process. Amplitudes of recorded geodetic and gravimetric signals are comparable to amplitudes observed at other periodically restless calderas. We conclude that shallow aqueous fluid migration can contribute significantly to periodic unrest, explaining the lack of eruptions in many cases of unrest.</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>caldera</json:string><json:string>hydrothermal</json:string><json:string>gottsmann</json:string><json:string>seismic</json:string><json:string>nisyros</json:string><json:string>volcanol</json:string><json:string>gravimetric</json:string><json:string>geophys</json:string><json:string>degassing</json:string><json:string>ground deformation</json:string><json:string>geophysical</json:string><json:string>caliro</json:string><json:string>geotherm</json:string><json:string>lett</json:string><json:string>dzurisin</json:string><json:string>hydrothermal systems</json:string><json:string>caldera unrest</json:string><json:string>seismic intensity</json:string><json:string>hydrothermal system</json:string><json:string>yellowstone 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and Hydrogeology, University of Neuchâtel, Neuchâtel, Switzerland</json:string></affiliations></json:item><json:item><name>Luke Wooller</name><affiliations><json:string>Department of Earth Sciences, Open University, Milton Keynes, UK</json:string></affiliations></json:item><json:item><name>Stefanie Hautmann</name><affiliations><json:string>Department of Earth Sciences, University of Bristol, Bristol, UK</json:string></affiliations></json:item><json:item><name>Hazel Rymer</name><affiliations><json:string>Department of Earth Sciences, Open University, Milton Keynes, UK</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>caldera unrest</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>hydrothermal systems</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>monitoring</value></json:item></subject><articleId><json:string>2007GL029594</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Unrest at collapse calderas is generally thought to be triggered by the arrival of new magma at shallow depth. But few unrest periods at calderas over the past decades have culminated in volcanic eruptions and the role of hydrothermal processes during unrest is drawing more and more attention. Here we report joint and simultaneous continuous multi‐parameter observations made at the restless Nisyros caldera (Greece), which reveal non‐steady short‐term oscillatory signals. The combined geodetic, gravimetric, seismic and electromagnetic records indicate that the oscillations are associated with thermohydromechanical disturbances of the hydrothermal system. The dominant period of oscillation (40–60 min) indicates short‐term processes most likely associated with instabilities in the degassing process. Amplitudes of recorded geodetic and gravimetric signals are comparable to amplitudes observed at other periodically restless calderas. We conclude that shallow aqueous fluid migration can contribute significantly to periodic unrest, explaining the lack of eruptions in many cases of unrest.</abstract><qualityIndicators><score>5.896</score><pdfVersion>1.4</pdfVersion><pdfPageSize>612 x 792 pts (letter)</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1098</abstractCharCount><pdfWordCount>3596</pdfWordCount><pdfCharCount>21998</pdfCharCount><pdfPageCount>5</pdfPageCount><abstractWordCount>150</abstractWordCount></qualityIndicators><title>Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece</title><genre><json:string>article</json:string></genre><host><title>Geophysical Research Letters</title><language><json:string>unknown</json:string></language><doi><json:string>10.1002/(ISSN)1944-8007</json:string></doi><issn><json:string>0094-8276</json:string></issn><eissn><json:string>1944-8007</json:string></eissn><publisherId><json:string>GRL</json:string></publisherId><volume>34</volume><issue>7</issue><pages><first>n/a</first><last>n/a</last><total>5</total></pages><genre><json:string>journal</json:string></genre><subject><json:item><value>BIOGEOSCIENCES</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>GEOCHEMISTRY</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>MARINE GEOLOGY AND GEOPHYSICS</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>MINERALOGY AND PETROLOGY</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>NATURAL HAZARDS</value></json:item><json:item><value>Geological</value></json:item><json:item><value>OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>SEISMOLOGY</value></json:item><json:item><value>Volcano seismology</value></json:item><json:item><value>TECTONOPHYSICS</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>VOLCANOLOGY</value></json:item><json:item><value>Volcano monitoring</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>Calderas</value></json:item><json:item><value>Solid Earth</value></json:item></subject></host><categories><wos><json:string>science</json:string><json:string>geosciences, multidisciplinary</json:string></wos><scienceMetrix><json:string>natural sciences</json:string><json:string>earth & environmental sciences</json:string><json:string>meteorology & atmospheric 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type="first">Joachim</forename><surname>Gottsmann</surname></persName><email>j.gottsmann@bristol.ac.uk</email><affiliation><orgName>Department of Earth Sciences</orgName><orgName>University of Bristol</orgName><address><settlement type="city">Bristol</settlement><country key="GB">UK</country></address></affiliation></author><author xml:id="author-0001"><persName><forename type="first">Roberto</forename><surname>Carniel</surname></persName><affiliation><orgName>Dipartimento di Georisorse e Territorio</orgName><orgName>Università di Udine</orgName><address><settlement type="city">Udine</settlement><country key="IT">Italy</country></address></affiliation></author><author xml:id="author-0002"><persName><forename type="first">Nicolas</forename><surname>Coppo</surname></persName><affiliation><orgName>Institute of Geology and Hydrogeology</orgName><orgName>University of Neuchâtel</orgName><address><settlement type="city">Neuchâtel</settlement><country key="CH">Switzerland</country></address></affiliation></author><author xml:id="author-0003"><persName><forename type="first">Luke</forename><surname>Wooller</surname></persName><affiliation><orgName>Department of Earth Sciences</orgName><orgName>Open University</orgName><address><settlement type="city">Milton Keynes</settlement><country key="GB">UK</country></address></affiliation></author><author xml:id="author-0004"><persName><forename type="first">Stefanie</forename><surname>Hautmann</surname></persName><affiliation><orgName>Department of Earth Sciences</orgName><orgName>University of Bristol</orgName><address><settlement type="city">Bristol</settlement><country key="GB">UK</country></address></affiliation></author><author xml:id="author-0005"><persName><forename type="first">Hazel</forename><surname>Rymer</surname></persName><affiliation><orgName>Department of Earth Sciences</orgName><orgName>Open University</orgName><address><settlement type="city">Milton Keynes</settlement><country key="GB">UK</country></address></affiliation></author><idno type="istex">76D5ADA5DA8F5DA673FF15010F26CDCD507D7333</idno><idno type="DOI">10.1029/2007GL029594</idno><idno type="editorialOffice">2007GL029594</idno><idno type="society">L07307</idno><idno type="unit">GRL23023</idno><idno type="toTypesetVersion">file:GRL.GRL23023.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.v34.7</idno><idno type="product">GRL</idno><idno type="coden">GPRLAJ</idno><imprint><biblScope unit="vol">34</biblScope><biblScope unit="issue">7</biblScope><biblScope unit="page-count">5</biblScope><date type="published" when="2007-04"></date></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><abstract style="main"><p xml:id="grl23023-para-0001">Unrest at collapse calderas is generally thought to be triggered by the arrival of new magma at shallow depth. But few unrest periods at calderas over the past decades have culminated in volcanic eruptions and the role of hydrothermal processes during unrest is drawing more and more attention. Here we report joint and simultaneous continuous multi‐parameter observations made at the restless Nisyros caldera (Greece), which reveal non‐steady short‐term oscillatory signals. The combined geodetic, gravimetric, seismic and electromagnetic records indicate that the oscillations are associated with thermohydromechanical disturbances of the hydrothermal system. The dominant period of oscillation (40–60 min) indicates short‐term processes most likely associated with instabilities in the degassing process. Amplitudes of recorded geodetic and gravimetric signals are comparable to amplitudes observed at other periodically restless calderas. We conclude that shallow aqueous fluid migration can contribute significantly to periodic unrest, explaining the lack of eruptions in many cases of unrest.</p></abstract><textClass><keywords><term xml:id="grl23023-kwd-0001">caldera unrest</term><term xml:id="grl23023-kwd-0002">hydrothermal systems</term><term xml:id="grl23023-kwd-0003">monitoring</term></keywords><classCode scheme="http://psi.agu.org/taxonomy5/0400">BIOGEOSCIENCES</classCode><classCode scheme="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</classCode><classCode scheme="http://psi.agu.org/taxonomy5/3600">MINERALOGY AND PETROLOGY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</classCode><classCode scheme="http://psi.agu.org/taxonomy5/4800">OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</classCode><classCode scheme="http://psi.agu.org/taxonomy5/7200">SEISMOLOGY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/8100">TECTONOPHYSICS</classCode><classCode scheme="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</classCode><classCode scheme="articleCategory">Solid Earth</classCode><classCode scheme="tocHeading1">Solid Earth</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/76D5ADA5DA8F5DA673FF15010F26CDCD507D7333/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="grl23023"><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><id type="coden" value="GPRLAJ"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="GEOPHYSICAL RESEARCH LETTERS">Geophysical Research Letters</title><title type="short">Geophys. 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Lett.</journalTitle>, <vol>34</vol>, L07307, doi:<accessionId ref="info:doi/10.1029/2007GL029594">10.1029/2007GL029594</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:GRL.GRL23023.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="3"></count></countGroup><titleGroup><title type="main">Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece</title><title type="short">HYDROTHERMAL SYSTEMS AND CALDERA UNREST</title><title type="shortAuthors">Gottsmann <i>et al</i>.</title></titleGroup><creators><creator creatorRole="author" xml:id="grl23023-cr-0001" affiliationRef="#grl23023-aff-0001"><personName><givenNames>Joachim</givenNames> <familyName>Gottsmann</familyName></personName><contactDetails><email normalForm="j.gottsmann@bristol.ac.uk">j.gottsmann@bristol.ac.uk</email></contactDetails></creator><creator creatorRole="author" xml:id="grl23023-cr-0002" affiliationRef="#grl23023-aff-0002"><personName><givenNames>Roberto</givenNames> <familyName>Carniel</familyName></personName></creator><creator creatorRole="author" xml:id="grl23023-cr-0003" affiliationRef="#grl23023-aff-0003"><personName><givenNames>Nicolas</givenNames> <familyName>Coppo</familyName></personName></creator><creator creatorRole="author" xml:id="grl23023-cr-0004" affiliationRef="#grl23023-aff-0004"><personName><givenNames>Luke</givenNames> <familyName>Wooller</familyName></personName></creator><creator creatorRole="author" xml:id="grl23023-cr-0005" affiliationRef="#grl23023-aff-0001"><personName><givenNames>Stefanie</givenNames> <familyName>Hautmann</familyName></personName></creator><creator creatorRole="author" xml:id="grl23023-cr-0006" affiliationRef="#grl23023-aff-0004"><personName><givenNames>Hazel</givenNames> <familyName>Rymer</familyName></personName></creator></creators><affiliationGroup><affiliation countryCode="GB" type="organization" xml:id="grl23023-aff-0001"><orgDiv>Department of Earth Sciences</orgDiv><orgName>University of Bristol</orgName><address><city>Bristol</city><country>UK</country></address></affiliation><affiliation countryCode="IT" type="organization" xml:id="grl23023-aff-0002"><orgDiv>Dipartimento di Georisorse e Territorio</orgDiv><orgName>Università di Udine</orgName><address><city>Udine</city><country>Italy</country></address></affiliation><affiliation countryCode="CH" type="organization" xml:id="grl23023-aff-0003"><orgDiv>Institute of Geology and Hydrogeology</orgDiv><orgName>University of Neuchâtel</orgName><address><city>Neuchâtel</city><country>Switzerland</country></address></affiliation><affiliation countryCode="GB" type="organization" xml:id="grl23023-aff-0004"><orgDiv>Department of Earth Sciences</orgDiv><orgName>Open University</orgName><address><city>Milton Keynes</city><country>UK</country></address></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="grl23023-kwd-0001">caldera unrest</keyword><keyword xml:id="grl23023-kwd-0002">hydrothermal systems</keyword><keyword xml:id="grl23023-kwd-0003">monitoring</keyword></keywordGroup><abstractGroup><abstract type="main"><p xml:id="grl23023-para-0001" label="1">Unrest at collapse calderas is generally thought to be triggered by the arrival of new magma at shallow depth. 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Carniel, N. Coppo, L. Wooller, S. Hautmann, and H. Rymer (2007), Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece, Geophys. Res. Lett., 34, L07307, doi:10.1029/2007GL029594.</edition><copyrightDate encoding="w3cdtf">2007</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">3</extent></physicalDescription><abstract>Unrest at collapse calderas is generally thought to be triggered by the arrival of new magma at shallow depth. But few unrest periods at calderas over the past decades have culminated in volcanic eruptions and the role of hydrothermal processes during unrest is drawing more and more attention. Here we report joint and simultaneous continuous multi‐parameter observations made at the restless Nisyros caldera (Greece), which reveal non‐steady short‐term oscillatory signals. The combined geodetic, gravimetric, seismic and electromagnetic records indicate that the oscillations are associated with thermohydromechanical disturbances of the hydrothermal system. The dominant period of oscillation (40–60 min) indicates short‐term processes most likely associated with instabilities in the degassing process. Amplitudes of recorded geodetic and gravimetric signals are comparable to amplitudes observed at other periodically restless calderas. 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