Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3140
DC FieldValueLanguage
dc.contributor.authorallGiampiccolo, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italiaen
dc.contributor.authorallD'amico, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italiaen
dc.contributor.authorallPatanè, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italiaen
dc.contributor.authorallGresta, S.; Dipartimento di Scienze geologiche, Università di Cataniaen
dc.date.accessioned2007-12-12T15:47:26Zen
dc.date.available2007-12-12T15:47:26Zen
dc.date.issued2007-02en
dc.identifier.urihttp://hdl.handle.net/2122/3140en
dc.description.abstractWe estimated the attenuation laws of high-frequency seismic waves in the shallow crust (depth 5 km) and earthquake source parameters by using a selected data set of 320 shallow events (2.6 MD 4.2), recorded at Mt. Etna volcano during the last two flank eruptions occurring in 2001 and 2002–2003. The quality factor (Q) was estimated from spectra of P and S waves for 24 stations of the local permanent network by applying a spectral ratio technique. The results show variations in both QP and QS as a function of frequency, according to the power law Q Q0 f n, with n ranging between 0.3 and 1.3 for P waves and between 0.2 and 0.9 for S waves. As typical of volcanic environments, strong azimuthal variations of QP were also found, suggesting the presence of local strong lateral heterogeneities and/or of fluid-filled cracked volumes. After correction for attenuation, we estimated the source parameters (seismic moment, source radius, and stress drop) of a subset of 66 shallow events, under the assumption of a circular dislocation. The estimated seismic moments M0 range from 1013 to 1015 N m. The source radii (r) are confined between 100 and 1000 m and stress drop (Dr) ranges between 0.2 MPa and about 4 MPa. Combining the source parameters obtained in this study with those calculated by Patane` et al. (1997) for an old data set of smaller microearthquakes (109 M0 1014 N m) recorded in the same area, we re-evaluated the scaling relationship between seismic moment (M0) and corner frequency ( fc) for the earthquakes with M0 ranging between 1013 and 1015 N m. We confirm that microearthquakes at Mt. Etna seem not to obey a scaling relationship, as generally observed for moderate to 3 M f 0 c large earthquakes, as the slope of the scale dependence about 4.3 or higher. Assuming that this dependence is real, within the uncertainty in the results, a departure from the self-similarity exists for the volcanotectonic earthquakes at Mt. Etna.en
dc.language.isoEnglishen
dc.relation.ispartofBulletin of the Seismological Society of Americaen
dc.relation.ispartofseries1B/97(2007)en
dc.subjectAttenuationen
dc.subjectMt. Etnaen
dc.titleAttenuation and Source Parameters of Shallow Microearthquakesen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber184-197en
dc.subject.INGV04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismologyen
dc.identifier.doi10.1785/0120050252en
dc.description.obiettivoSpecifico3.1. Fisica dei terremotien
dc.description.obiettivoSpecifico1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attiveen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorGiampiccolo, E.en
dc.contributor.authorD'amico, S.en
dc.contributor.authorPatanè, D.en
dc.contributor.authorGresta, S.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italiaen
dc.contributor.departmentDipartimento di Scienze geologiche, Università di Cataniaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia-
crisitem.author.deptUniversità di Catania-
crisitem.author.orcid0000-0001-5203-7436-
crisitem.author.orcid0000-0003-0027-5381-
crisitem.author.orcid0000-0001-9410-5126-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
Appears in Collections:Article published / in press
Files in This Item:
File Description SizeFormat Existing users please Login
971b_05252.1_14.pdf631.81 kBAdobe PDF
Show simple item record

WEB OF SCIENCETM
Citations

42
checked on Feb 10, 2021

Page view(s) 50

328
checked on Mar 27, 2024

Download(s)

34
checked on Mar 27, 2024

Google ScholarTM

Check

Altmetric