Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/12363
Authors: Milana, Giuliano* 
Cultrera, Giovanna* 
Bordoni, Paola* 
Bucci, Augusto* 
Cara, Fabrizio* 
Cogliano, Rocco* 
Di Giulio, Giuseppe* 
Di Naccio, Deborah* 
Famiani, Daniela* 
Fodarella, Antonio* 
Mercuri, Alessia* 
Pischiutta, Marta* 
Pucillo, Stefania* 
Riccio, Gaetano* 
Vassallo, Maurizio* 
Title: Local site effects estimation at Amatrice (Central Italy) through seismological methods
Issue Date: 16-Feb-2019
DOI: 10.1007/s10518-019-00587-3
URI: http://hdl.handle.net/2122/12363
Keywords: Amatrice village
Central Italy 2016–2018 seismic sequence
Site effects
Seismic microzonation
Ambient vibration
Surface waves techniques
Subject Classification04.06. Seismology
Abstract: We present the results of seismological and geophysical investigations performed by the “Istituto Nazionale di Geofisica e Vulcanologia” team operating in Amatrice village (Central Italy), in the emergency phases following the Mw 6.0 event of August 24th 2016, that caused severe damage in downtown and surrounding areas. Data from seven seismic stations equipped with both weak and strong motion sensors are analyzed in terms of standard spectral ratio to empirically define amplification function using a bedrock reference site. Ambient vibration spectral ratios between horizontal and vertical component of motion are also evaluated in a large number of sites, spread out in the investigated area, to recover the resonance frequency of the soft soil outcropping layers and to generalize the results obtained by earthquake data. Ambient noise vibration are also used for applying a 2D array approach based on surface waves techniques in order to define the near-surface velocity model and to verify its lateral variation. The results allows to better understand the amplification factors in the investigated area, showing spatial variation of site effects despite of the homogeneous shallow geological condition indicated by the microzonation studies available at moment of the described field campaign. The analysis reveals a diffuse amplification effect which reaches its maximum values in downtown area with a resonant frequency of about 2 Hz. The obtained results were used to integrate the microzonation studies and they can be used for urban planning and reconstruction activities.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Milana2019_Article_LocalSiteEffectsEstimationAtAm.pdf7.47 MBAdobe PDFView/Open
Show full item record

Page view(s)

7
checked on May 27, 2019

Download(s)

3
checked on May 27, 2019

Google ScholarTM

Check

Altmetric