Skip to Main Content
Skip Nav Destination

2016-2017 central Italy earthquake sequence; seismic retrofit policy and effectiveness

Silvia Mazzoni, Giulio Castori, Carmine Galasso, Paolo Calvi, Richard Dreyer, Erica Fischer, Alessandro Fulco, Luigi Sorrentino, Jay Wilson, Andrea Penna and Guido Magenes
2016-2017 central Italy earthquake sequence; seismic retrofit policy and effectiveness
Earthquake Spectra (November 2018) 34 (4): 1671-1691


The 2016-2017 Central Italy earthquake sequence consisted of several moderately high-magnitude earthquakes, between M5.5 and M6.5, each centered in a different location and with its own sequences of aftershocks spanning several months. To study the effects of this earthquake sequence on the built environment and the impact on the communities, a collaborative reconnaissance effort was organized by the Earthquake Engineering Research Institute (EERI), the Eucentre Foundation, the European Centre for Training and Research in Earthquake Engineering (EUCentre), and the Rete dei Laboratori Universitari di Ingegneria Sismica (ReLuis). The effort consisted of two reconnaissance missions: one following the Amatrice Earthquake of 24 August 2016 and one after the end of the earthquake sequence, in May 2017. One objective of the reconnaissance effort was to evaluate existing strengthening methodologies and assess their effectiveness in mitigating the damaging effects of ground shaking. Parallel studies by the Geotechnical Extreme Events Reconnaissance (GEER) Association, presented in a companion paper, demonstrate that variations in-ground motions due to topographic site effects had a significant impact on damage distribution in the affected area. This paper presents that, in addition to these ground motion variations, variations in the vulnerability of residential and critical facilities were observed to have a significant impact on the level of damage in the region. The damage to the historical centers of Amatrice and Norcia will be used in this evaluation: the historical center of Amatrice was devastated by the sequence of earthquakes; the significant damage in Norcia was localized to individual buildings. Amatrice has not experienced the same number of devastating earthquakes as Norcia in the last 150 years. As a result, its building stock is much older than that of Norcia and there appeared to be little visual evidence of strengthening of the buildings. The distribution of damage observed throughout the region was found to be indicative of the effectiveness of strengthening and of the need for a comprehensive implementation of retrofit policies.

ISSN: 8755-2930
EISSN: 1944-8201
Serial Title: Earthquake Spectra
Serial Volume: 34
Serial Issue: 4
Title: 2016-2017 central Italy earthquake sequence; seismic retrofit policy and effectiveness
Affiliation: University of California at Berkeley, Berkeley, CA, United States
Pages: 1671-1691
Published: 201811
Text Language: English
Publisher: Earthquake Engineering Research Institute, Berkeley, CA, United States
References: 25
Accession Number: 2021-010439
Categories: SeismologyEngineering geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch maps
N42°00'00" - N44°00'00", E12°30'00" - E13°40'00"
Secondary Affiliation: Universita di Perugia, ITA, ItalyUniversity College London, GBR, United KingdomUniversity of Washington, USA, United StatesHolmes Structures, USA, United StatesOregon State University, USA, United StatesUniversita di Roma Sapienza, ITA, ItalyClackamas County, USA, United StatesEUCENTRE, ITA, Italy
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2021
Close Modal

or Create an Account

Close Modal
Close Modal