Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/11153
DC Field | Value | Language |
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dc.date.accessioned | 2018-03-13T13:56:49Z | en |
dc.date.available | 2018-03-13T13:56:49Z | en |
dc.date.issued | 2002-05-15 | en |
dc.identifier.uri | http://hdl.handle.net/2122/11153 | en |
dc.description.abstract | On July, 12, 2001, Mt. Etna experienced a sudden increase of seismic activity heralding one of the most intense eruptions of the past 30 years. Between July 12 and July 18, when the eruption started, thousands of small magnitude earthquakes occurred and were recorded by a dense seismic network run by the Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania (INGV-CT). Hypocentral depths of earthquakes were very shallow, mostly located above 3 km b.s.l. and clustered near the summit area. The high quality seismic dataset gives us the unique opportunity to study the process of magma migration before the eruption. In this study we present the three-dimensional earthquake locations and the velocity structure obtained by a tomographic inversion. The shallowness of seismicity allowed us to enhance the details of the structure beneath the summit craters, in a volume poorly defined by previous tomographic studies. The presence of a high Vp-body previously observed at Mt. Etna is confirmed at shallow depth beneath the southeastern part of the summit area. The earthquakes preceding the eruption onset concentrated at its western border. A low Vp/Vs anomaly is found at 0–1 km depth, just at the top of the volume where the magma intruded before the eruption. This anomalous zone can be considered as molten material wealthy in gas. The relocated seismicity occurs in a cylinder below the vents activated along the fracture system and exhibited an upward migration until the eruption. All these results show evidence for the emplacement of a near-vertical dyke striking about N-S and a few kilometres south of the summit craters. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Geophysical Research Letters | en |
dc.relation.ispartofseries | 10/ 29 (2002) | en |
dc.subject | Mt. Etna eruption | en |
dc.subject | Tomographic images | en |
dc.subject | seismic swarm | en |
dc.subject | 3D earthquake locations | en |
dc.title | Tomographic images and 3D earthquake locations of the seismic swarm preceding the 2001 Mt. Etna eruption: Evidence for a dyke intrusion | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 1497 | en |
dc.identifier.doi | 10.1029/2001GL014391 | en |
dc.relation.references | Bonaccorso, A., M. Aloisi, and M. Mattia, Dike emplacement forerrunning the Etna July 2001 eruption modeled through continuous tilt and GPS data, submitted to Geophys. Res. Lett., 2002. Wiley Online Library | Web of Science® Times Cited: 48 Cardaci, C., M. Coviello, G. Lombardo, G. Patanè, and R. Scarpa, Seismic tomography of Etna volcano, J. Volc. Geoth. Res., 56, 357–368, 1993. CrossRef | Web of Science® Times Cited: 47 | ADS Chiarabba, C., A. Amato, E. Boschi, and F. Barbari, Recent seismicity and tomographic modeling of the Mount Etna plumbing system, J. Geophys. Res., 105(B5), 10,923–10,938, 2000. Wiley Online Library | Web of Science® Times Cited: 94 Christensen, N. I., Seismic velocities, in CRC Practical handbook of physical properties of rocks and minerals, edited by R. S. Carmichael, CRC Press, Boca Raton, Fl., 1989. De Luca, G., L. Filippi, G. Patanè, and S. Vinciguerra, Three-dimensional velocity structure and seismicity of Mt. Etna volcano, Italy, J. Volc. Geoth. Res., 79, 123–138, 1997. CrossRef | CAS | Web of Science® Times Cited: 24 | ADS Eberhart-Phillips, D., Local earthquake tomography: earthquake source regions, in Seismic Tomography: Theory and Practice, edited by H. M. Iyer, and K. Hirahara, pp. 613–643, Chapman and Hall, London, 1993. Eberhart-Phillips, D., and M. Reyners, Continental subduction and three-dimensional crustal structure: The northern South Island, New Zealand, J. Geophys. Res., 102, 11,843–11,861, 1997. Wiley Online Library | Web of Science® Times Cited: 115 Hirn, A., A. Nercessian, M. Sapin, F. Ferrucci, and G. Wittlinger, Seismic heterogeneity of Mt. Etna: structure and activity, Geophys. J. Int., 105, 139–153, 1991. Wiley Online Library | Web of Science® Times Cited: 100 Lahar, J. C., HYPOELLIPSE/VERSION 2.0*: A computer program for determining local earthquake hypocentral parameters, magnitude, and first motion pattern. U.S. Geol. Sur., Open-File Report 89-116, 81 pp., 1989. Laigle, M., A. Hirn, M. Sapin, J. C. Lepine, J. Diaz, J. Gallart, and R. Nicolich, Mount Etna dense array local earthquake P and S tomography and implications for volcanic plumbing, J. Geophys. Res., 105(B9), 21,633–21,646, 2000. Wiley Online Library | Web of Science® Times Cited: 64 Lees, J. M., and H. Wu, Poisson's ratio and porosity at Coso geothermal area, California, J. Volc. Geoth. Res., 95, 157–173, 2000. CrossRef | CAS | Web of Science® Times Cited: 34 | ADS Muller, H. J., and S. Raab, Elastic wave velocities of Granite at experimental simulated partial melting conditions, Phys. Chem. Earth, 22, 93–96, 1997. CrossRef | ADS Thurber, C. H., Earthquake location and three-dimensional crustal structure in the Coyote Lake area, central California, J. Geophys. Res., 88, 8226 –8236, 1983. Wiley Online Library | Web of Science® Times Cited: 538 Thurber, C. H., Local earthquake tomography: velocity and VP/VS-theory, in Seismic Tomography: Theory and Practice, edited by H. M. Iyer, and K. Hirahara, pp. 563–583, Chapman and Hall, London, 1993. Sanders, C. O., S. C. Ponko, L. D. Nixon, and E. A. Schwartz, Seismological evidence for magmatic and hydrothermal structure in Long Valley caldera from local earthquake attenuation and velocity tomography, J. Geophys. Res., 100, 8311–8326, 1995. Wiley Online Library | Web of Science® Times Cited: 67 Villasenor, A., H. M. Benz, L. Filippi, G. De Luca, R. Scarpa, G. Patanè, and S. Vinciguerra, Three dimensional P-wave velocity structure of Mt. Etna Italy, Geophys. Res. Lett., 25, 1975–1978, 1998. Wiley Online Library | Web of Science® Times Cited: 44 | en |
dc.description.obiettivoSpecifico | 2V. Struttura e sistema di alimentazione dei vulcani | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Patanè, Domenico | en |
dc.contributor.author | Chiarabba, Claudio | en |
dc.contributor.author | Cocina, Ornella | en |
dc.contributor.author | De Gori, Pasquale | en |
dc.contributor.author | Moretti, Milena | en |
dc.contributor.author | Boschi, Enzo | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione AC, Roma, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
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 OE, Catania, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | - |
crisitem.author.orcid | 0000-0001-9410-5126 | - |
crisitem.author.orcid | 0000-0002-8111-3466 | - |
crisitem.author.orcid | 0000-0003-1856-830X | - |
crisitem.author.orcid | 0000-0001-8160-0849 | - |
crisitem.author.orcid | 0000-0003-0260-6869 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
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 | - |
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 | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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File | Description | Size | Format | |
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2002_Patanè&Al_GRL.pdf | Main file | 475.57 kB | Adobe PDF | View/Open |
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