Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/9445
DC Field | Value | Language |
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dc.contributor.authorall | Galluzzo, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia | en |
dc.contributor.authorall | La Rocca, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia | en |
dc.contributor.authorall | Margerin, L.; Université de Tolouse, France | en |
dc.contributor.authorall | Del Pezzo, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia | en |
dc.contributor.authorall | Scarpa, R.; Università di Salerno, Italy | en |
dc.date.accessioned | 2015-04-01T12:19:28Z | en |
dc.date.available | 2015-04-01T12:19:28Z | en |
dc.date.issued | 2015-01 | en |
dc.identifier.uri | http://hdl.handle.net/2122/9445 | en |
dc.description.abstract | An analysis of coda waves excited in the 0.2–20 Hz frequency band and recorded by the underground array Underseis (central Italy) has been performed to constrain both seismic attenuation at regional scale and velocity structure in the Mount Gran Sasso area. Attenuation was estimated with the MLTWA method, and shows a predominance of scattering phenomena over intrinsic absorption. The values of Qi and Qs are compatible with other estimates obtained in similar tectonic environments. Array methods allowed for a detailed study of the propagation characteristics, demonstrating that earthquake coda at frequencies greater than about 6 Hz is composed of only body waves. Coherence and spectral characteristics of seismic waves measured along the coda of local and regional earthquakes indicate that the wavefield becomes fully diffuse only in the late coda. The frequency-dependent energy partitioning between horizontal and vertical components has been also estimated and compared with synthetic values computed in a layered half-space under the diffuse field assumption. This comparison confirms that, for frequencies higher than 6 Hz, the coda appears as a sum of body waves coming from all directions while, in the low frequency range (0.2–2 Hz), the observations can be well explained by a coda wavefield composed of an equipartition mixture of surface and body waves traveling in a multiple-layered medium. A Monte-Carlo inversion has been performed to obtain a set of acceptable velocity models of the upper crust. The present results show that a broadband coda wavefield recorded in an underground environment is useful to constrain both the regional attenuation and the velocity structure of the target area, thereby complementing the results of classical array analysis of the wavefield. | en |
dc.language.iso | English | en |
dc.publisher.name | Elsevier Science Limited | en |
dc.relation.ispartof | Physics of the Earth and Planetary Interiors | en |
dc.relation.ispartofseries | /240 (2015) | en |
dc.subject | Energy equipartition | en |
dc.subject | Scattering | en |
dc.subject | velocity/attenuation structure | en |
dc.subject | array analysis | en |
dc.subject | Diffuse wavefield | en |
dc.title | Attenuation and velocity structure from diffuse coda waves: Constraints from underground array data | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 34 - 42 | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis | en |
dc.identifier.doi | 10.1016/j.pepi.2014.12.004 | en |
dc.description.obiettivoSpecifico | 4T. Fisica dei terremoti e scenari cosismici | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | restricted | en |
dc.relation.issn | 0031-9201 | en |
dc.relation.eissn | 1872-7395 | en |
dc.contributor.author | Galluzzo, D. | en |
dc.contributor.author | La Rocca, M. | en |
dc.contributor.author | Margerin, L. | en |
dc.contributor.author | Del Pezzo, E. | en |
dc.contributor.author | Scarpa, R. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia | en |
dc.contributor.department | Université de Tolouse, France | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia | en |
dc.contributor.department | Università di Salerno, 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 | Univerista della Calabria, Italy | - |
crisitem.author.dept | Université de Tolouse, France | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | - |
crisitem.author.dept | Università di Salerno, Dipartimento di Fisica "E.R. Caianiello", Salerno, Italy | - |
crisitem.author.orcid | 0000-0002-8952-9271 | - |
crisitem.author.orcid | 0000-0002-6981-5967 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.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 |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
Phys Earth Planet In 2015 Galluzzo.pdf | main article | 3.42 MB | Adobe PDF | |
PEPI_2015.pdf | Open Access | 2.23 MB | Adobe PDF | View/Open |
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