Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/854
DC Field | Value | Language |
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dc.contributor.authorall | Castro, R. R.; CICESE, División Ciencias de la Tierra, Departamento de Sismología, Ensenada, Baja California, México | en |
dc.contributor.authorall | Gallipoli, M. R.; Istituto di Metodologie per l Analisi Ambientale (IMAA) CNR, Tito Scalo (PZ), Italy | en |
dc.contributor.authorall | Mucciarelli, M.; Di.S.G.G., Università degli Studi della Basilicata, Potenza, Italy | en |
dc.date.accessioned | 2006-02-22T09:32:51Z | en |
dc.date.available | 2006-02-22T09:32:51Z | en |
dc.date.issued | 2004 | en |
dc.identifier.uri | http://hdl.handle.net/2122/854 | en |
dc.description.abstract | We determined a set of empirical functions that describe the spectral amplitude decay of S-waves with distance in Southern Italy. We analyzed 32 earthquakes with magnitudes ML 2.0-5.4 and hypocentral distances ranging between 12 and 216 km. We obtained attenuation functions for 14 frequencies(1.0< f<20.0 Hz). We compared these functions with average non-parametric attenuation functions reported by Castro et al. (1999) for different regions of Italy, and we observe that at low frequencies (f<5.0 Hz) the spectral amplitudes from earthquakes in Southern Italy decay faster than the average. However, at high frequencies ( f > 5.0 Hz), the spectral amplitudes are above the average. At higher frequencies ( f > 10 Hz), the attenuation functions obtained for Southern Italy are slightly above the standard deviation of the average attenuation functions. It is possible that in this frequency range (10-20 Hz) site effects may influence the amplitude decay. In order to quantify the attenuation of the S-waves, we estimated the quality factor Q modeling the empirical attenuation functions using the following parametric form: A( f , r)=10/r b·e- pfR/Q ß; where 1.6 = f = 10.0 Hz is the frequency band with minimum effect of instrument and site response, r = 120 km is the distance range where the rate of decay of the spectral amplitudes is approximately constant, R=(r-10) and ß=3.2 km/s. We found that the exponent b=1.0±0.2 in the frequency band analyzed and Q shows a frequency dependence that can be approximated by the function Q=32.1 f 1.7. | en |
dc.format.extent | 1721738 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.publisher.name | INGV | en |
dc.relation.ispartof | Annals of Geophysics | en |
dc.relation.ispartofseries | 5/47 (2004) | en |
dc.subject | seismic attenuation | en |
dc.subject | Southern Italy | en |
dc.subject | Q | en |
dc.title | An attenuation study in Southern Italy using local and regional earthquakes recorded by seismic network of Basilicata | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.contributor.author | Castro, R. R. | en |
dc.contributor.author | Gallipoli, M. R. | en |
dc.contributor.author | Mucciarelli, M. | en |
dc.contributor.department | CICESE, División Ciencias de la Tierra, Departamento de Sismología, Ensenada, Baja California, México | en |
dc.contributor.department | Istituto di Metodologie per l Analisi Ambientale (IMAA) CNR, Tito Scalo (PZ), Italy | en |
dc.contributor.department | Di.S.G.G., Università degli Studi della Basilicata, Potenza, Italy | 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 | CICESE, División Ciencias de la Tierra, Departamento de Sismología, Ensenada, Baja California, México | - |
crisitem.author.dept | ituto di Metodologie Avanzate di Analisi Ambientale, CNR, Tito Scalo (PZ), Italy | - |
crisitem.classification.parent | 04. Solid Earth | - |
Appears in Collections: | Annals of Geophysics |
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07RamnCastro.pdf | 1.68 MB | Adobe PDF | View/Open |
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