Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/5953| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Chiarabba, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia | en |
| dc.contributor.authorall | De Gori, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia | en |
| dc.contributor.authorall | Piccinini, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.date.accessioned | 2010-03-09T10:38:30Z | en |
| dc.date.available | 2010-03-09T10:38:30Z | en |
| dc.date.issued | 2009-10-15 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/5953 | en |
| dc.description.abstract | The 1997 Umbria Marche is probably the best ever monitored normal faulting seismic sequence. Seismicity migration and multiple main shocks characterize the activation of a 40-km-long system of contiguous fault segments, as documented by seismological data. Many authors as indicative of fault weakening by fluids migration have interpreted this behaviour. In this study, we create a new catalogue of high quality P- and S-wave arrival times merging data recorded by permanent and temporary stations to improve the resolution of velocity and attenuation models and earthquake locations. We show that the relocated earthquakes and the joint interpretation of P- and S-wave velocity and attenuation models help in understanding the faulting processes, revealing new details of the geometry of the main faults and physical state of fluids within the crustal volume. We observe that large aftershocks occur on the top and within the Triassic evaporitic layer, a rock volume locally characterised by fluid over-pressured, as evidenced by high VP/VS and low QP/QS anomalies. Velocity and attenuation heterogeneities are evidence that the migration of fluid pressure along the fault system is the driving mechanism of the prolonged earthquake sequence. | en |
| dc.language.iso | English | en |
| dc.publisher.name | Elsevier | en |
| dc.relation.ispartof | Tectonophysics | en |
| dc.relation.ispartofseries | 1-2/ 476 (2009) | en |
| dc.subject | Velocity and Attenuation tomography | en |
| dc.subject | Normal fault system | en |
| dc.title | Velocity and attenuation tomography of the Umbria Marche 1997 fault system: Evidence of a fluid-governed seismic sequence | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.description.pagenumber | 73-84 | en |
| dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution | en |
| dc.identifier.doi | 10.1016/j.tecto.2009.04.004 | en |
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In: Palaz, I., Marfurt, K.J. (Eds.), Seismic properties of carbonate rocks. Geophysical Developments Series, vol. 6. Carbonate Seismology: Society of Exploration Geophysicists, pp. 29–52. Wang, Z., Nur, A.M., 1989. Seismic and Acoustic Velocities in Reservoir Rocks, Volume 2. Theoretical and Model Studies: SEG Geophysics reprint series, vol. 10, p. 457. Winkler, K., Nur, A., 1979. Pore fluids and seismic attenuation in rocks. Geophys. Res. Lett. 6, 1–4. Zhao, D., Negishi, H., 1998. The 1995 Kobe earthquake: seismic image of the source zone and its implications for the rupture nucleation. J. Geophys. Res. 103, 9967–9986. | en |
| dc.description.obiettivoSpecifico | 1.1. TTC - Monitoraggio sismico del territorio nazionale | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | reserved | en |
| dc.contributor.author | Chiarabba, C. | en |
| dc.contributor.author | De Gori, P. | en |
| dc.contributor.author | Piccinini, D. | 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, Sezione Roma1, Roma, Italia | 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 ONT, Roma, 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 Pisa, Pisa, Italia | - |
| crisitem.author.orcid | 0000-0002-8111-3466 | - |
| crisitem.author.orcid | 0000-0001-8160-0849 | - |
| crisitem.author.orcid | 0000-0002-1826-646X | - |
| 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.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 | |
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