Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece
Identifieur interne : 000136 ( Main/Exploration ); précédent : 000135; suivant : 000137Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece
Auteurs : Joachim Gottsmann [Royaume-Uni] ; Roberto Carniel [Italie] ; Nicolas Coppo [Suisse] ; Luke Wooller [Royaume-Uni] ; Stefanie Hautmann [Royaume-Uni] ; Hazel Rymer [Royaume-Uni]Source :
- Geophysical Research Letters [ 0094-8276 ] ; 2007-04.
Descripteurs français
- Pascal (Inist)
- Wicri :
- geographic : Grèce.
- topic : Migration, Sciences de la terre, Université ouverte.
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, Greece, 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, Perturbation, 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, Short term, Source depth, Subsurface dynamics, Teleseismic events, Unrest, Unrest periods, Upper geyser basin, Volcanic eruption, Volcano, Volcano geodesy, Volcanol, Yellowstone caldera, amplitude, calderas, collapse, degassing, instability, joints, magmas, migration, oscillations, shallow depth, volcanoes.
- 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
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000015
- to stream Istex, to step Curation: 000015
- to stream Istex, to step Checkpoint: 000092
- to stream Main, to step Merge: 000136
- to stream PascalFrancis, to step Corpus: 000022
- to stream PascalFrancis, to step Curation: 000018
- to stream PascalFrancis, to step Checkpoint: 000019
- to stream Main, to step Merge: 000143
- to stream Main, to step Curation: 000136
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece</title><author><name sortKey="Gottsmann, Joachim" sort="Gottsmann, Joachim" uniqKey="Gottsmann J" first="Joachim" last="Gottsmann">Joachim Gottsmann</name></author><author><name sortKey="Carniel, Roberto" sort="Carniel, Roberto" uniqKey="Carniel R" first="Roberto" last="Carniel">Roberto Carniel</name></author><author><name sortKey="Coppo, Nicolas" sort="Coppo, Nicolas" uniqKey="Coppo N" first="Nicolas" last="Coppo">Nicolas Coppo</name></author><author><name sortKey="Wooller, Luke" sort="Wooller, Luke" uniqKey="Wooller L" first="Luke" last="Wooller">Luke Wooller</name></author><author><name sortKey="Hautmann, Stefanie" sort="Hautmann, Stefanie" uniqKey="Hautmann S" first="Stefanie" last="Hautmann">Stefanie Hautmann</name></author><author><name sortKey="Rymer, Hazel" sort="Rymer, Hazel" uniqKey="Rymer H" first="Hazel" last="Rymer">Hazel Rymer</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:76D5ADA5DA8F5DA673FF15010F26CDCD507D7333</idno><date when="2007" year="2007">2007</date><idno type="doi">10.1029/2007GL029594</idno><idno type="url">https://api.istex.fr/document/76D5ADA5DA8F5DA673FF15010F26CDCD507D7333/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000015</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000015</idno><idno type="wicri:Area/Istex/Curation">000015</idno><idno type="wicri:Area/Istex/Checkpoint">000092</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000092</idno><idno type="wicri:doubleKey">0094-8276:2007:Gottsmann J:oscillations:in:hydrothermal</idno><idno type="wicri:Area/Main/Merge">000136</idno><idno type="wicri:source">INIST</idno><idno type="RBID">Pascal:07-0264334</idno><idno type="wicri:Area/PascalFrancis/Corpus">000022</idno><idno type="wicri:Area/PascalFrancis/Curation">000018</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000019</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000019</idno><idno type="wicri:doubleKey">0094-8276:2007:Gottsmann J:oscillations:in:hydrothermal</idno><idno type="wicri:Area/Main/Merge">000143</idno><idno type="wicri:Area/Main/Curation">000136</idno><idno type="wicri:Area/Main/Exploration">000136</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main">Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece</title><author><name sortKey="Gottsmann, Joachim" sort="Gottsmann, Joachim" uniqKey="Gottsmann J" first="Joachim" last="Gottsmann">Joachim Gottsmann</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Department of Earth Sciences, University of Bristol, Bristol</wicri:regionArea><wicri:noRegion>Bristol</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Royaume-Uni</country></affiliation></author><author><name sortKey="Carniel, Roberto" sort="Carniel, Roberto" uniqKey="Carniel R" first="Roberto" last="Carniel">Roberto Carniel</name><affiliation wicri:level="1"><country xml:lang="fr">Italie</country><wicri:regionArea>Dipartimento di Georisorse e Territorio, Università di Udine, Udine</wicri:regionArea><wicri:noRegion>Udine</wicri:noRegion></affiliation></author><author><name sortKey="Coppo, Nicolas" sort="Coppo, Nicolas" uniqKey="Coppo N" first="Nicolas" last="Coppo">Nicolas Coppo</name><affiliation wicri:level="1"><country xml:lang="fr">Suisse</country><wicri:regionArea>Institute of Geology and Hydrogeology, University of Neuchâtel, Neuchâtel</wicri:regionArea><wicri:noRegion>Neuchâtel</wicri:noRegion></affiliation></author><author><name sortKey="Wooller, Luke" sort="Wooller, Luke" uniqKey="Wooller L" first="Luke" last="Wooller">Luke Wooller</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Department of Earth Sciences, Open University, Milton Keynes</wicri:regionArea><wicri:noRegion>Milton Keynes</wicri:noRegion></affiliation></author><author><name sortKey="Hautmann, Stefanie" sort="Hautmann, Stefanie" uniqKey="Hautmann S" first="Stefanie" last="Hautmann">Stefanie Hautmann</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Department of Earth Sciences, University of Bristol, Bristol</wicri:regionArea><wicri:noRegion>Bristol</wicri:noRegion></affiliation></author><author><name sortKey="Rymer, Hazel" sort="Rymer, Hazel" uniqKey="Rymer H" first="Hazel" last="Rymer">Hazel Rymer</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Department of Earth Sciences, Open University, Milton Keynes</wicri:regionArea><wicri:noRegion>Milton Keynes</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Geophysical Research Letters</title><title level="j" type="alt">GEOPHYSICAL RESEARCH LETTERS</title><idno type="ISSN">0094-8276</idno><idno type="eISSN">1944-8007</idno><imprint><biblScope unit="vol">34</biblScope><biblScope unit="issue">7</biblScope><biblScope unit="page-count">5</biblScope><date type="published" when="2007-04">2007-04</date></imprint><idno type="ISSN">0094-8276</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0094-8276</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aqueous fluid migration</term><term>Average amplitudes</term><term>Bouguer density</term><term>Caldera</term><term>Caldera floor</term><term>Caldera unrest</term><term>Caldera volcanoes</term><term>Caliro</term><term>Campi flegrei</term><term>Campi flegrei caldera</term><term>Continuous gravity</term><term>Data sets</term><term>Degassing</term><term>Degassing process</term><term>Delay time</term><term>Discrete bursts</term><term>Dominant period</term><term>Dzurisin</term><term>Earth planet</term><term>Earth sciences</term><term>Electrical properties</term><term>Electromagnetic signal</term><term>Fluid flow</term><term>Fluid migration</term><term>Geophys</term><term>Geophysical</term><term>Geophysical signals</term><term>Geotherm</term><term>Gottsmann</term><term>Gravimetric</term><term>Gravimetric record</term><term>Gravity</term><term>Gravity changes</term><term>Gravity data</term><term>Gravity increase</term><term>Gravity record</term><term>Gravity variations</term><term>Greece</term><term>Ground deformation</term><term>Ground subsidence</term><term>Hydrothermal</term><term>Hydrothermal system</term><term>Hydrothermal systems</term><term>Lett</term><term>Many cases</term><term>Milton keynes</term><term>Multiparameter insights</term><term>Nisyros</term><term>Nisyros caldera</term><term>Nisyros island</term><term>Nisyros volcano</term><term>Open university</term><term>Oscillation</term><term>Periodic oscillation</term><term>Periodic oscillations</term><term>Periodic unrest</term><term>Perturbation</term><term>Phreatic crater</term><term>Poor satellite coverage</term><term>Power spectrum</term><term>Record displays</term><term>Residual gravity changes</term><term>Restless caldera</term><term>Restless calderas</term><term>Same location</term><term>Seismic</term><term>Seismic intensity</term><term>Seismic record</term><term>Shallow depth</term><term>Short term</term><term>Source depth</term><term>Subsurface dynamics</term><term>Teleseismic events</term><term>Unrest</term><term>Unrest periods</term><term>Upper geyser basin</term><term>Volcanic eruption</term><term>Volcano</term><term>Volcano geodesy</term><term>Volcanol</term><term>Yellowstone caldera</term><term>amplitude</term><term>calderas</term><term>collapse</term><term>degassing</term><term>instability</term><term>joints</term><term>magmas</term><term>migration</term><term>oscillations</term><term>shallow depth</term><term>volcanoes</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Amplitude</term><term>Caldeira</term><term>Court terme</term><term>Diaclase</term><term>Dégazage</term><term>Effondrement</term><term>Eruption volcanique</term><term>Faible profondeur</term><term>Grèce</term><term>Instabilité</term><term>Magma</term><term>Migration</term><term>Oscillation</term><term>Perturbation</term><term>Volcan</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Aqueous fluid migration</term><term>Average amplitudes</term><term>Bouguer density</term><term>Caldera</term><term>Caldera floor</term><term>Caldera unrest</term><term>Caldera volcanoes</term><term>Caliro</term><term>Campi flegrei</term><term>Campi flegrei caldera</term><term>Continuous gravity</term><term>Data sets</term><term>Degassing</term><term>Degassing process</term><term>Delay time</term><term>Discrete bursts</term><term>Dominant period</term><term>Dzurisin</term><term>Earth planet</term><term>Earth sciences</term><term>Electrical properties</term><term>Electromagnetic signal</term><term>Fluid flow</term><term>Fluid migration</term><term>Geophys</term><term>Geophysical</term><term>Geophysical signals</term><term>Geotherm</term><term>Gottsmann</term><term>Gravimetric</term><term>Gravimetric record</term><term>Gravity</term><term>Gravity changes</term><term>Gravity data</term><term>Gravity increase</term><term>Gravity record</term><term>Gravity variations</term><term>Ground deformation</term><term>Ground subsidence</term><term>Hydrothermal</term><term>Hydrothermal system</term><term>Hydrothermal systems</term><term>Lett</term><term>Many cases</term><term>Milton keynes</term><term>Multiparameter insights</term><term>Nisyros</term><term>Nisyros caldera</term><term>Nisyros island</term><term>Nisyros volcano</term><term>Open university</term><term>Oscillation</term><term>Periodic oscillation</term><term>Periodic oscillations</term><term>Periodic unrest</term><term>Phreatic crater</term><term>Poor satellite coverage</term><term>Power spectrum</term><term>Record displays</term><term>Residual gravity changes</term><term>Restless caldera</term><term>Restless calderas</term><term>Same location</term><term>Seismic</term><term>Seismic intensity</term><term>Seismic record</term><term>Shallow depth</term><term>Source depth</term><term>Subsurface dynamics</term><term>Teleseismic events</term><term>Unrest</term><term>Unrest periods</term><term>Upper geyser basin</term><term>Volcano</term><term>Volcano geodesy</term><term>Volcanol</term><term>Yellowstone caldera</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Grèce</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Migration</term><term>Sciences de la terre</term><term>Université ouverte</term></keywords></textClass></profileDesc></teiHeader><front><div type="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.</div></front></TEI><affiliations><list><country><li>Italie</li><li>Royaume-Uni</li><li>Suisse</li></country></list><tree><country name="Royaume-Uni"><noRegion><name sortKey="Gottsmann, Joachim" sort="Gottsmann, Joachim" uniqKey="Gottsmann J" first="Joachim" last="Gottsmann">Joachim Gottsmann</name></noRegion><name sortKey="Gottsmann, Joachim" sort="Gottsmann, Joachim" uniqKey="Gottsmann J" first="Joachim" last="Gottsmann">Joachim Gottsmann</name><name sortKey="Hautmann, Stefanie" sort="Hautmann, Stefanie" uniqKey="Hautmann S" first="Stefanie" last="Hautmann">Stefanie Hautmann</name><name sortKey="Rymer, Hazel" sort="Rymer, Hazel" uniqKey="Rymer H" first="Hazel" last="Rymer">Hazel Rymer</name><name sortKey="Wooller, Luke" sort="Wooller, Luke" uniqKey="Wooller L" first="Luke" last="Wooller">Luke Wooller</name></country><country name="Italie"><noRegion><name sortKey="Carniel, Roberto" sort="Carniel, Roberto" uniqKey="Carniel R" first="Roberto" last="Carniel">Roberto Carniel</name></noRegion></country><country name="Suisse"><noRegion><name sortKey="Coppo, Nicolas" sort="Coppo, Nicolas" uniqKey="Coppo N" first="Nicolas" last="Coppo">Nicolas Coppo</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/NissirosV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000136 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000136 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= NissirosV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:76D5ADA5DA8F5DA673FF15010F26CDCD507D7333
|texte= Oscillations in hydrothermal systems as a source of periodic unrest at caldera volcanoes: Multiparameter insights from Nisyros, Greece
}}
| This area was generated with Dilib version V0.6.33. |  |