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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7671

Authors: Puglia, R.*
Albarello, D.*
Gorini, A.*
Luzi, L.*
Marcucci, S.*
Pacor, F.*
Title: Extensive characterization of Italian accelerometric stations from single-station ambient-vibration measurements
Title of journal: Bulletin of Earthquake Engineering
Series/Report no.: 6/9 (2011)
Publisher: Springer
Issue Date: Dec-2011
DOI: 10.1007/s10518-011-9305-z
Keywords: Ambient vibration measurements
Strong motion database
Abstract: This paper describes the analyses of the single-station ambient-vibration measurements performed on the Italian accelerometric network to detect site resonance phenomena potentially affecting earthquake recordings. The use of low cost, high quality microtremor measurement can be helpful to discriminate among soil classes, since several classification schemes based on resonance frequencies were proposed in the last decades. Operatively, in the framework of the Italian Strong Motion Database project (DPC-INGV 2007–2009 S4; http://esse4.mi.ingv.it), soil resonance frequencies have been evaluated from more than 200 ambient vibration measurements in correspondence of accelerometric stations included in ITACA (http://itaca.mi.ingv.it/ItacaNet/). The noise recordings have been analyzed using the same numerical protocol in order to standardize the results. Particular attention has been paid to evaluate the quality of measurements and to develop an on-purpose mathematical tool to automatically estimate the peaks in the horizontal-to-vertical spectral ratio (HVSR) curve. The reliability of the resonance frequencies from HVSR has been tested by comparing estimates provided by independent methods (modeling or earthquake recordings). The test confirmed the reliability of the microtremor HVSR for assessing the resonance frequencies of the examined sites.
Appears in Collections:04.06.06. Surveys, measurements, and monitoring
Papers Published / Papers in press

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