Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/12889
DC Field | Value | Language |
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dc.date.accessioned | 2019-11-21T08:58:58Z | en |
dc.date.available | 2019-11-21T08:58:58Z | en |
dc.date.issued | 2020 | en |
dc.identifier.uri | http://hdl.handle.net/2122/12889 | en |
dc.description.abstract | This work is devoted to the study of the background seismic noise at Ischia Island. We highlight two persistent independent signals, with dominant frequency peaks in the range 1−2Hz and 3−4 Hz, respectively. The first signal is the most energetic and persistent and its polarization properties are well defined, revealing a shallow propagation likely controlled by both tectonic/volcanic structures and morphological features. This signal is well correlated at all the stations in the Casamicciola area and its group velocity is estimated as 500−600m/s. The second signal shows similar polarization properties but the temporal pattern of its amplitude is strongly affected by anthropogenic noise, revealing a modulation on a diurnal scale. On the investigated spatial scales, any clearly correlated signal is not evidenced. We interpret the 1−2Hz correlated wave-packets as the persistent whisper of the shallow circulation of fluids, which are a mixing of sea and meteoric water and thermal fluids of the hydrothermal reservoir. In the conceptual scheme of the self-sustained musical instruments, we hypothesize that the solid structure of the shallow hydrothermal system of Ischia is formed by a network of channels, continuously excited by the circulating hydrothermal fluids, which produce a whispered sound (i.e. the seismic noise). This mechanism is able to produce persistent self-sustained oscillations that we observe as the 1−2Hz seismic signal and, eventually, higher modes. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Journal of Volcanology and Geothermal Research | en |
dc.relation.ispartofseries | /389 (2020) | en |
dc.subject | Ischia Island | en |
dc.subject | Hydrothermal noise | en |
dc.subject | ICA | en |
dc.title | The whisper of the hydrothermal seismic noise at Ischia Island | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 106693 | en |
dc.identifier.doi | 10.1016/j.jvolgeores.2019.106693 | en |
dc.description.obiettivoSpecifico | 4V. Processi pre-eruttivi | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Cusano, Paola | en |
dc.contributor.author | Petrosino, Simona | en |
dc.contributor.author | De Lauro, Enza | en |
dc.contributor.author | Falanga, Mariarosaria | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | en |
dc.contributor.department | Università degli Studi di Salerno, Dipartimento di Ingegneria dell'Informazione ed Elettrica e Matematica applicata/DIEM, Fisciano, Italy | en |
dc.contributor.department | Università degli Studi di Salerno, Dipartimento di Ingegneria dell'Informazione ed Elettrica e Matematica applicata/DIEM, Fisciano, Italy | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | - |
crisitem.author.dept | University of Salerno | - |
crisitem.author.orcid | 0000-0002-6266-6225 | - |
crisitem.author.orcid | 0000-0002-5042-0244 | - |
crisitem.author.orcid | 0000-0002-8841-1861 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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File | Description | Size | Format | Existing users please Login |
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CusanoEtAl2019JVGR.pdf | 3.87 MB | Adobe PDF |
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