Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/8934| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Avallone, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia | en |
| dc.contributor.authorall | Rovelli, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.authorall | Di Giulio, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.authorall | Improta, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.authorall | Ben-Zion, Y.; University of Southern California | en |
| dc.contributor.authorall | Milana, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.authorall | Cara, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.date.accessioned | 2014-02-19T13:13:18Z | en |
| dc.date.available | 2014-02-19T13:13:18Z | en |
| dc.date.issued | 2014-01-21 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/8934 | en |
| dc.description.abstract | A 10 Hz sampling frequency GPS station was installed near L'Aquila a few days before the 6 April 2009 Mw 6.1 earthquake. It recorded displacement waveforms during the main shock and the largest Mw 5.4 aftershock of 7 April. The horizontal components of the main shock contain a high-amplitude (43 cm peak-to-peak) nearly harmonic (1 Hz) wave train not evident in other nearby instrumental records. The persistency of this feature during aftershocks recorded by a temporarily colocated seismological station highlights a local site effect. Traditional models based on near-surface velocity structure and topography variations fail to reproduce the size and frequency band of the observed amplified motion. The amplified wave train can be explained by a low-velocity fault zone layer below the station. This model fits the delay of the large-amplitude nearly harmonic wave train after the S wave phase and is consistent with the variation in the fault excitation efficiency between the two shocks in relation to their different source depth and location. Synthetic calculation of trapped waves in a model consisting of two quarter spaces separated by a 650 m wide low-velocity zone with 50% velocity reduction and Q value of 20 fit well the observed anomalous record. The parameters of the model fault zone layer are consistent with geological evidence of a broad damage zone adjacent to the station and a similar site response found in this crustal zone with ambient noise. Results of shallow seismic surveys and sonic logs from deep wells provide independent constraints on the host rock velocities. | en |
| dc.description.sponsorship | This work has partially benefited from the activities performed in the NERA project (Network of European Research infrastructures for earthquake risk Assessment and mitigation, 262330), funded by the European Commission FP7 program, and in the FIRB-Abruzzo project, funded by the Italian Ministery of Education, University and Research. | en |
| dc.language.iso | English | en |
| dc.publisher.name | American Geophysical Union | en |
| dc.relation.ispartof | Journal of geophysical research - solid earth | en |
| dc.relation.ispartofseries | 1/119 (2014) | en |
| dc.subject | High-rate GPS | en |
| dc.subject | Transient deformation | en |
| dc.subject | L'Aquila earthquake | en |
| dc.subject | fault-guided waves | en |
| dc.title | Wave-guide effects in very high rate GPS record of the 6 April 2009, Mw 6.1 L'Aquila, central Italy earthquake | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | 490–501 | en |
| dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion | en |
| dc.identifier.doi | 10.1002/2013JB010475 | en |
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Res. Lett., 38, L08306, doi:10.1029/2011GL046714. Valoroso, L., L. Chiaraluce, D. Piccinini, R. Di Stefano, D. Schaff, and F. Waldhauser (2013), Radiography of a normal fault system by 64,000 high precision earthquake locations: The 2009 L’Aquila (central Italy) case study, J. Geophys. Res. Solid Earth, 118, 1156–1176, doi:10.1002/jgrb.50130. Walters, R. J., J. R. Elliott, N. D’Agostino, P. C. England, I. Hunstad, J. A. Jackson, B. Parsons, R. J. Phillips, and G. Roberts (2009), The 2009 L’Aquila earthquake (central Italy): A source mechanism and implications for seismic hazard, Geophys. Res. Lett., 36, L17312, doi:10.1029/2009GL039337. Working Group Catalogo Parametrico dei Terremoti Italiani (CPTI) (2004), Catalogo Parametrico dei Terremoti Italiani, v. 2004 (CPTI04),320 pp., Istituto Nazionale di Geofisica e Vulcanologia, Bologna, Italy [Available at http://emidius.mi.ingv.it/CPTI/]. | en |
| dc.description.obiettivoSpecifico | 2T. Tettonica attiva | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | restricted | en |
| dc.relation.issn | 0148-0227 | en |
| dc.contributor.author | Avallone, A. | en |
| dc.contributor.author | Rovelli, A. | en |
| dc.contributor.author | Di Giulio, G. | en |
| dc.contributor.author | Improta, L. | en |
| dc.contributor.author | Ben-Zion, Y. | en |
| dc.contributor.author | Milana, G. | en |
| dc.contributor.author | Cara, F. | 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 |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.department | University of Southern California | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, 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 Roma1, Roma, Italia | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | - |
| crisitem.author.dept | University of Southern California | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
| crisitem.author.orcid | 0000-0002-0264-2897 | - |
| crisitem.author.orcid | 0000-0002-4097-7102 | - |
| crisitem.author.orcid | 0000-0003-0952-3978 | - |
| crisitem.author.orcid | 0000-0002-2775-4924 | - |
| crisitem.author.orcid | 0000-0002-1702-563X | - |
| 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.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 | - |
| 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 | - |
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