Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4843
DC FieldValueLanguage
dc.contributor.authorallVassallo, M.; Dipartimento di Scienze Fisiche Università di Napoli Federico IIen
dc.contributor.authorallBobbio, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italiaen
dc.contributor.authorallIannaccone, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italiaen
dc.date.accessioned2008-12-16T07:54:24Zen
dc.date.available2008-12-16T07:54:24Zen
dc.date.issued2008-12en
dc.identifier.urihttp://hdl.handle.net/2122/4843en
dc.description.abstractThe Campi Flegrei (southern Italy) is one of the most active calderas in the world. This caldera is characterized by episodes of slow vertical ground movement, called bradyseism. With several hundred thousand people living within its borders, this area is in a high-risk category should there be an eruption. The seismological monitoring system in the Campi Flegrei is based on nine seismic stations, eight of which are equipped with short-period seismometers (1 Hz), and one with a broadband seismometer (60 sec–50 Hz). While all of the seismic stations are located on land, part of the seismic activity occurs in the undersea area of the Pozzuoli Gulf (Campi Flegrei), where there are no seismic stations. This gap in the data coverage produces a biased and incomplete image of the volcanic area.We carried out an experiment in the Pozzuoli Gulf with the installation of two broadband seismic stations on the seafloor with remote and continuous data acquisition for a duration of 31 days between January and March 2005. Using the data acquired, we have computed the power spectral density (PSD) to characterize the background seismic noise, and to evaluate the true noise variation, we have generated the seismic noise probability density functions from the computed PSD curves. The results of our analysis show that the broadband seismic noise is high when compared with the Peterson noise model (land model), but for periods less than 0.3 sec, the seismic noise on the seafloor is lower than the recordings on land over the same period range. The last bradyseismic crisis (1982–1984) highlights the importance of this frequency range, where most of the spectral content of the recorded earthquakes was observed. Finally, we evaluate the detection threshold of a new seismic station located on the seafloor of the Campi Flegrei caldera considering the characteristics of the local seismicity. This analysis shows that the detection threshold for the sea-floor stations (Mw ∼ 0:2) is less than that for land stations (Mw ∼ 0:8).en
dc.language.isoEnglishen
dc.publisher.nameSeismological Society of Americaen
dc.relation.ispartofBulletin of the Seismological Society of Americaen
dc.relation.ispartofseries/98 (2008)en
dc.subjectCampi Flegrei Calderaen
dc.subjectSea-Floor and On-Land Seismicen
dc.titleA comparison of sea floor and on land seismic ambient noise in the Campi Flegrei caldera (Southern Italy)en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber2962–2974en
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoringen
dc.identifier.doi10.1785/0120070152en
dc.relation.referencesAbramovich, I. A., V. Agafonov, M. Cobern, V. Kozlov, and A. Kharlamov (1997). Improved, wide-band molecular electronic seismometer and data acquisition system, Eos 78, 463. Aster, R., R. P. Meyer, G. De Natale, A. Zollo, R. Scarpa, E. Del Pezzo, M. Martini, and G. Iannaccone (1992). Seismic investigation of the Campi Flegrei: a summary and synthesis of results, in Volcanic Seismology, P. Gasparini, R. Scarpa and K. Aki (Editors), Springer-Verlag, Berlin, 462–483. Babcock, J., B. Kirkendall, and J. Orcutt (1994). Relationship between ocean bottom noise and the environment, Bull. Seismol. Soc. Am. 84, 1991–2007. Bianchi, R., A. Coradini, C. Federico, G. Giberti, P. Luciano, J. P. Pozzi, G. Sartoris, and R. Scandone (1987). Modelling of surface ground deformation in volcanic areas: the 1970–1972 and 1982–1984 crises of Campi Flegrei, Italy, J. Geophys. Res. 92, 14,139–14,150. Brune, J. N. (1970). Tectonic stress and the spectra of seismic shear waves from earthquakes, J. Geophys. Res. 75, 4997–5009. De Natale, G., and A. Zollo (1986). Statistical analysis and clustering features of the Phlegraean Fields earthquake sequence (May 1983– May 1984), Bull. Seismol. Soc. Am. 76, 801–814. De Natale, G., G. Iannaccone, M. Martini, and A. Zollo (1987). Seismic sources and attenuation properties at the Campi Flegrei volcanic area, Pure Appl. Geophys. 125, 6, 883–917. De Natale, G., C. Troise, F. Pingue, G. Mastrolorenzo, L. Pappalardo, and E. Boschi (2006). The Campi Flegrei Caldera: unrest mechanisms and hazards, in Mechanisms of Activity and Unrest at Large Calderas, C. Troise, G. De Natale and C. R. J. Kilburn (Editors), Geol. Soc. London Spec. Publ. 269, 25–45. Del Pezzo, E., G. De Natale, M. Martini, and A. Zollo (1987). Source parameters of microearthquakes at Phlegrean Fields (southern Italy) volcanic area, Phys. Earth Planet. Interiors 47, 25–42. Dvorak, J. J., and P. Gasparini (1991). History of earthquakes and vertical movement in Campi Flegrei Caldera, southern Italy: comparison of precursory events to the A.D. 1538 eruption of Monte Nuovo and activity since 1968, J. Volcanol. Geotherm. Res. 48, 77–92. Hanks, T. C., and H. Kanamori (1979). A moment magnitude scale, J. Geophys. Res. 84, 2348–2350. Macedonio, G., and U. Tammaro (2006). Attività di Sorveglianza dell’Osservatorio Vesuviano, Rendiconto anno 2005, Technical Report, Istituto Nazionale di Geofisica e Vulcanologia—Osservatorio, Vesuviano, Napoli. Mc Namara, E., and P. Buland (2004). Ambient noise levels in the continental United States, Bull. Seismol. Soc. Am. 94, no. 4, 517–1527. Melton, B. S. (1976). The sensitivity and dynamic range of inertial seismographs, Rev. Geophys. 14, no. 1 93–116. Peterson, J. (1993). Observation and modeling of seismic background noise, U.S. Geol. Surv. Open-File Rept. 93-322. Pulliam, J., Y. Nakamura, C. Huerta-Lopez, and B. Yates (2003). Field test of an inexpensive, small broadband ocean-bottom seismograph, Bull. Seismol. Soc. Am. 93, 1, 152–171. Romanowicz, B., D. Stakes, J. P. Montagner, P. Tarits, R. Uhrhammer, M. Begnaud, E. Stutzmann, M. Pasyanos, J. F. Karczewski, S. Etchemendy, and D. Neuhauser (1998). A pilot experiment towards long term sea-floor geophysical observatories, Earth Planets Space 50, 927–937. Rosi, M., and A. Sbrana (1987). Phlegrean fields, CNR Quad. de “La Ricerca Scientifica” 114, 1–175. Saccorotti, G., F. Bianco, M. Castellano, and E. Del Pezzo (2001). The July– August 2000 seismic swarms at Campi Flegrei volcanic complex, Italy, Geophys. Res. Lett. 28, 2525–2528. Saccorotti, G., S. Petrosino, F. Bianco, M. Castellano, D. Galluzzo, M. La Rocca, E. Del Pezzo, L. Zaccarelli, and P. Cusano (2007). Seismicity associated with the 2004–2006 renewed ground uplift at Campi Flegrei Caldera, Italy, Phys. Earth Planet. Interiors 165, 14–24. Stephen, R., F. Spiess, J. Collins, J. Hildebrand, J. Orcutt, K. Peal, F. Vernon, and F. Wooding (2003). Ocean seismic network of pilot experiment, Geochem. Geophys. Geosyst. 4, no. 10, 1092, doi 10.1029/ 2002GC000485. Troise, C., G. De Natale, F. Pingue, F. Obrizzo, P. De Martino, U. Tammaro, and E. Boschi (2007). Renewed ground uplift at Campi Flegrei caldera (Italy): new insight on magmatic processes and forecast, Geophys. Res. Lett. 34, L03301, doi 10.1029/2006GL028545. Webb, S. C. (1992). The equilibrium oceanic microseismic spectrum, J. Acoust. Soc. Am. 92, 2141–2158. Webb, S. C. (1998). Broadband seismology and noise under the ocean, Rev. Geophys. 36, 105–142. Welch, P. D. (1967). The use of fast Fourier transform for the estimation of power spectra: a method based on time averaging over short, modified periodograms, IEEE Trans. Audio Electroacoust. 15, 70–73. Wessel, P., and W. H. F. Smith (1991). Free software helps map and display data, EOS Trans. AGU 72, 441, doi 10.1029/90EO00319. Wilcock, W. S. D., S. C. Webb, and I. Th. Bjarnason (1999). The effect of local wind on seismic noise near 1 Hz at the MELT site and in Iceland, Bull. Seismol. Soc. Am. 89, no. 6, 1543–1557. Zeldenrust, I., and R. A. Stephen (2000). Shear wave resonances in sediments on the deep sea floor, Eos Trans. AGU 81, no. 48, F819 (Fall Meet. Suppl.).en
dc.description.obiettivoSpecifico1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attiveen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorVassallo, M.en
dc.contributor.authorBobbio, A.en
dc.contributor.authorIannaccone, G.en
dc.contributor.departmentDipartimento di Scienze Fisiche Università di Napoli Federico IIen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italiaen
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 Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia-
crisitem.author.orcid0000-0001-8552-6965-
crisitem.author.orcid0000-0003-2386-8737-
crisitem.author.orcid0000-0002-1323-9016-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
Appears in Collections:Article published / in press
Files in This Item:
File Description SizeFormat Existing users please Login
2962.pdf1.82 MBAdobe PDF
Show simple item record

WEB OF SCIENCETM
Citations 50

15
checked on Feb 10, 2021

Page view(s)

297
checked on Mar 27, 2024

Download(s)

25
checked on Mar 27, 2024

Google ScholarTM

Check

Altmetric