Publication Date:
2017-04-04
Description:
The attenuation of P- and S-waves in Southeastern Sicily was estimated by applying two different methods in time and
frequency domains. We analyzed waveforms from about 290 local events (0.6 ≤ ML ≤ 4.6) recorded at a three-component
digital network.
By applying the pulse broadeningmethod to the first P-wave pulse,we found an averageQp value of ca. 140. The application
of the frequency decay method provided a Qp value of ca. 120, in the low-frequency band (3–9Hz). Conversely, in the high
frequency range (16–27Hz) the average Qp is significantly larger (ca. 640). The frequency decay method was also applied
to S-waves spectra. In the low frequency range (2–5Hz) the estimated average Qs is ca. 190. As for Qp, also Qs, in the high
frequency range (16–27Hz), is larger (ca. 700). These results evidenced a frequency dependence of both the quality factors
Qp and Qs, as commonly observed in tectonically active zones characterized by high degree of heterogeneity
Description:
Published
Description:
267-279
Description:
JCR Journal
Description:
reserved
Keywords:
attenuation
;
body waves
;
04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
