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Ground-motion scaling in eastern Sicily, Italy

Laura Scognamiglio, Luca Malagnini and Aybige Akinci
Ground-motion scaling in eastern Sicily, Italy
Bulletin of the Seismological Society of America (April 2005) 95 (2): 568-578


We describe the characteristics of crustal wave propagation in eastern Sicily by using the background seismicity of the area. We follow the approach described by Malagnini, Hermann, and Di Bona (2000) and Malagnini et al. (2002). Our data set consists of 106 earthquakes recorded by nine three-component digital seismic stations between 1994 and 2001. We used only crustal events (depths shallower than 25 km), with local magnitudes ranging from 1.0 to 4.3, and hypocentral distances from 10 to 130 km. Peak ground velocities from 1311 narrow bandpass-filtered waveforms are measured in the frequency range 1.0-16.0 Hz, and regressed to define crustal propagation, excitation, and site characteristics, with respect to a reference station. A subsequent modeling effort is carried out, through the use of random vibration theory (RVT), for obtaining a quantitative evaluation of the apparent geometrical spreading g(r), and of the crustal quality factor Q(f). An attenuation parameter, kappa (sub 0) , is also evaluated relative to a reference rock site. The attenuation and source parameters estimated in this study are used through the RVT in order to predict the peak horizontal ground acceleration (PGA), and the 5% damping pseudoacceleration spectra (PSA).

ISSN: 0037-1106
EISSN: 1943-3573
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 95
Serial Issue: 2
Title: Ground-motion scaling in eastern Sicily, Italy
Affiliation: Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Pages: 568-578
Published: 200504
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 44
Accession Number: 2005-047924
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sketch map
N36°45'00" - N38°15'00", E12°00'00" - E15°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200530
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