Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7358
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dc.contributor.authorallCarbone, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italiaen
dc.contributor.authorallZuccarello, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italiaen
dc.contributor.authorallMontalto, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italiaen
dc.contributor.authorallRymer, H.; The Open University, Department of Earth and Environmental Sciences, Walton Hall, Milton Keynes, MK7 6AA, UKen
dc.date.accessioned2012-01-17T15:03:08Zen
dc.date.available2012-01-17T15:03:08Zen
dc.date.issued2012en
dc.identifier.urihttp://hdl.handle.net/2122/7358en
dc.description.abstractA 56-hour gravity sequence, recorded in the crater area of Stromboli volcano, is presented. Data were acquired during a period of “normal” strombolian activity. High-frequency gravity anomalies (up to 20 microGal; T = tens of seconds) are observed. Comparison with independent data reveals that these changes reflect the response of the gravimeter excited by seismic waves during strombolian explosions. Correlated changes in the energy distribution over time appear in the continuous wavelet transforms of gravity and RMS-tremor, but over different scales, corresponding to periods centered at about 50 and 25 minutes, for gravity and tremor, respectively. We infer that the rate of fresh magma supply to the shallow feeding system controls the energy distribution over time of the coupled components in gravity and RMS-tremor signals. In particular, the gravity signal (with an average amplitude of 1-2 microGal) could be induced by temporary accumulations, at shallow depth, of the volatiles discharged by quiescent degassing. Changes in the rate of explosions from the summit craters correlate with changes in the amplitude of the coupled gravity and volcanic tremor oscillations, implying that, even though the slug-genesis process behind the explosions occurs at deeper levels, it is also controlled by the rate of gas-rich magma supply from below. Negative gravity anomalies of about 20 microGal, over intervals of some hours, are also observed, separated by intervals of about 24 hours. They could be induced by increases in magma vescicularity in the uppermost part of the conduit plexus, a view supported by (i) changes in the time/space distribution of tremor amplitudes and (ii) increases in spattering activity from a summit vent, both occurring during the development of the negative gravity anomalies. The processes behind mild Strombolian explosions do not trigger measurable gravity changes. Nevertheless, the slug ascent before a major explosion could induce a precursory gravity signal.en
dc.language.isoEnglishen
dc.publisher.nameGondawa Research Groupen
dc.relation.ispartofGondwana researchen
dc.relation.ispartofseries/22 (2012)en
dc.subjectStrombolien
dc.subjectGravity changesen
dc.subjectVolcanic tremoren
dc.subjectExplosion rateen
dc.titleNew geophysical insight into the dynamics of Stromboli volcano (Italy)en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber290-299en
dc.subject.INGV04. Solid Earth::04.03. Geodesy::04.03.05. Gravity variationsen
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismologyen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoringen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniquesen
dc.identifier.doi10.1016/j.gr.2011.09.007en
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dc.description.obiettivoSpecifico3.6. Fisica del vulcanismoen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.relation.issn1342-937Xen
dc.contributor.authorCarbone, D.en
dc.contributor.authorZuccarello, L.en
dc.contributor.authorMontalto, P.en
dc.contributor.authorRymer, H.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italiaen
dc.contributor.departmentThe Open University, Department of Earth and Environmental Sciences, Walton Hall, Milton Keynes, MK7 6AA, UKen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia-
crisitem.author.deptDepartment of Earth Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, United Kingdom-
crisitem.author.orcid0000-0003-2566-6290-
crisitem.author.orcid0000-0003-0094-9577-
crisitem.author.orcid0000-0001-5023-0558-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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