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http://hdl.handle.net/2122/9547
DC Field | Value | Language |
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dc.contributor.authorall | Akinci, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Malagnini, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Herrmann, R. B.; Saint Louis University | en |
dc.contributor.authorall | Kalafat, D.; Kandilli Observatory and Earthquake Research Institute | en |
dc.date.accessioned | 2015-04-20T08:28:59Z | en |
dc.date.available | 2015-04-20T08:28:59Z | en |
dc.date.issued | 2014 | en |
dc.identifier.uri | http://hdl.handle.net/2122/9547 | en |
dc.description.abstract | We provide a complete description of the characteristics of excitation and attenuation of the ground motion in the Lake Van region (eastern Turkey) using a data set that includes three-component seismograms from the 23 October 2011 Mw 7.1 Van earthquake, as well as its aftershocks. Regional attenuation and source scaling are parameterized to describe the observed ground motions as a function of distance, frequency, and magnitude. Peak ground velocities are measured in selected narrow frequency bands from 0.25 to 12.5 Hz; observed peaks are regressed to define a piecewise linear regional attenu- ation function, a set of excitation terms, and a set of site response terms. Results are modeled through random vibration theory (see Cartwright and Longuet-Higgins, 1956). In the log–log space, the regional crustal attenuation is modeled with a bilinear geo- metrical spreading g r characterized by a crossover distance at 40 km: g r ∝ r^−1 fits our results at short distances (r < 40 km), whereas g r ∝ r^−0.3 is better at larger distances (40 < r < 200 km). A frequency-dependent quality factor, Q f =100( f/fref)^ 0:43 (in which fref 1.0 Hz), is coupled to the geometrical spreading. Because of the inherent trade-off of the excitation/attenuation parameters (Δσ and κ), their specific values strongly depend on the choice made for the stress drop of the smaller earthquakes. After choosing a Brune stress drop ΔσBrune 4 MPa at Mw 3:5, we were able to define (1) an effective high frequency, distance- and mag- nitude-independent roll-off spectral parameter, κeff = 0:03 s and (2) a size-dependent stress-drop parameter, which increases with moment magnitude, from ΔσBrune 4 MPa at Mw 3.5 to ΔσBrune 20 MPa at Mw 7.1. The set of parameters mentioned here may be used in order to predict the earthquake-induced ground motions expected from future earthquakes in the region surrounding Lake Van. | en |
dc.language.iso | English | en |
dc.publisher.name | Seismological Society of America | en |
dc.relation.ispartof | Bulletin of the Seismological Society of America | en |
dc.subject | Earthquake-induced ground motion, Lake Van, Crustal attenuation | en |
dc.title | High-Frequency Attenuation in the Lake Van Region, Eastern Turkey | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.04. Ground motion | en |
dc.identifier.doi | 10.1785/0120130102 | en |
dc.description.obiettivoSpecifico | 4T. Fisica dei terremoti e scenari cosismici | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.relation.issn | 0037-1106 | en |
dc.relation.eissn | 1943-3573 | en |
dc.contributor.author | Akinci, A. | en |
dc.contributor.author | Malagnini, L. | en |
dc.contributor.author | Herrmann, R. B. | en |
dc.contributor.author | Kalafat, D. | 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 | Kandilli Observatory and Earthquake Research Institute | 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 Roma1, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Kandilli Observatory and Earthquake Research Institute | - |
crisitem.author.orcid | 0000-0001-8073-3420 | - |
crisitem.author.orcid | 0000-0001-5809-9945 | - |
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 | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
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Akinci_etal_BSSA2014.pdf | 1.04 MB | Adobe PDF | View/Open |
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