The 2013 Lunigiana (Central Italy) earthquake: Seismic source analysis from DInSAR and seismological data, and geodynamical implications for the northern Apennines

Giuseppe Pezzo*, John Peter Merryman Boncori, Simone Atzori, Davide Piccinini, Andrea Antonioli, Stefano Salvi

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this study we use Synthetic Aperture Radar Differential Interferometry (DInSAR) and seismological data to constrain the source of the mainshock of the 2013 Lunigiana (North-western Italy) seismic sequence, namely an Mw 5.1 event occurred on 2013 June 21. The sequence took place in a transfer zone located between the Lunigiana (North) and Garfagnana (South) graben. As the destructive Mw 6.2 earthquake occurred in 1920 has demonstrated, this area is seismically active and is considered the most hazardous area of the Northern Apennines.Hypocentre relocations of the Lunigiana sequence aftershocks are well fitted by a ~. 45° N-dipping fault plane, whereas the focal mechanism solution yields a dip-slip mechanism with a slight right-lateral strike-slip component. Surface displacements estimated from ascending COSMO-SkyMed imagery acquired in the time-span of a single day around the mainshock were used to derive an elastic dislocation model. The estimated slip distributions computed on fixed and variable size meshes show peak values of 30. cm and 40. cm respectively. Static stress variation analysis was performed to analyze possible stress overloads on the closest seismogenic sources. Our results provide insight into the tectonics of the Northern Apennines, suggesting the fundamental role of transfer fault zones in intra-mountain basin origin and in the assessment of seismic hazard in an extensional tectonic regime.

Original languageEnglish
JournalTectonophysics
Volume636
Pages (from-to)315-324
ISSN0040-1951
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • CFF variations
  • InSAR measurements
  • Lunigiana earthquake
  • Northern Apennines
  • Seismic sequence relocation
  • Seismic source modelling

Cite this

@article{8f08efce46ff41239c553df942217d8f,
title = "The 2013 Lunigiana (Central Italy) earthquake: Seismic source analysis from DInSAR and seismological data, and geodynamical implications for the northern Apennines",
abstract = "In this study we use Synthetic Aperture Radar Differential Interferometry (DInSAR) and seismological data to constrain the source of the mainshock of the 2013 Lunigiana (North-western Italy) seismic sequence, namely an Mw 5.1 event occurred on 2013 June 21. The sequence took place in a transfer zone located between the Lunigiana (North) and Garfagnana (South) graben. As the destructive Mw 6.2 earthquake occurred in 1920 has demonstrated, this area is seismically active and is considered the most hazardous area of the Northern Apennines.Hypocentre relocations of the Lunigiana sequence aftershocks are well fitted by a ~. 45° N-dipping fault plane, whereas the focal mechanism solution yields a dip-slip mechanism with a slight right-lateral strike-slip component. Surface displacements estimated from ascending COSMO-SkyMed imagery acquired in the time-span of a single day around the mainshock were used to derive an elastic dislocation model. The estimated slip distributions computed on fixed and variable size meshes show peak values of 30. cm and 40. cm respectively. Static stress variation analysis was performed to analyze possible stress overloads on the closest seismogenic sources. Our results provide insight into the tectonics of the Northern Apennines, suggesting the fundamental role of transfer fault zones in intra-mountain basin origin and in the assessment of seismic hazard in an extensional tectonic regime.",
keywords = "CFF variations, InSAR measurements, Lunigiana earthquake, Northern Apennines, Seismic sequence relocation, Seismic source modelling",
author = "Giuseppe Pezzo and {Merryman Boncori}, {John Peter} and Simone Atzori and Davide Piccinini and Andrea Antonioli and Stefano Salvi",
year = "2014",
doi = "10.1016/j.tecto.2014.09.005",
language = "English",
volume = "636",
pages = "315--324",
journal = "Tectonophysics",
issn = "0040-1951",
publisher = "Elsevier",

}

The 2013 Lunigiana (Central Italy) earthquake : Seismic source analysis from DInSAR and seismological data, and geodynamical implications for the northern Apennines. / Pezzo, Giuseppe; Merryman Boncori, John Peter; Atzori, Simone; Piccinini, Davide; Antonioli, Andrea; Salvi, Stefano.

In: Tectonophysics, Vol. 636, 2014, p. 315-324.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - The 2013 Lunigiana (Central Italy) earthquake

T2 - Seismic source analysis from DInSAR and seismological data, and geodynamical implications for the northern Apennines

AU - Pezzo, Giuseppe

AU - Merryman Boncori, John Peter

AU - Atzori, Simone

AU - Piccinini, Davide

AU - Antonioli, Andrea

AU - Salvi, Stefano

PY - 2014

Y1 - 2014

N2 - In this study we use Synthetic Aperture Radar Differential Interferometry (DInSAR) and seismological data to constrain the source of the mainshock of the 2013 Lunigiana (North-western Italy) seismic sequence, namely an Mw 5.1 event occurred on 2013 June 21. The sequence took place in a transfer zone located between the Lunigiana (North) and Garfagnana (South) graben. As the destructive Mw 6.2 earthquake occurred in 1920 has demonstrated, this area is seismically active and is considered the most hazardous area of the Northern Apennines.Hypocentre relocations of the Lunigiana sequence aftershocks are well fitted by a ~. 45° N-dipping fault plane, whereas the focal mechanism solution yields a dip-slip mechanism with a slight right-lateral strike-slip component. Surface displacements estimated from ascending COSMO-SkyMed imagery acquired in the time-span of a single day around the mainshock were used to derive an elastic dislocation model. The estimated slip distributions computed on fixed and variable size meshes show peak values of 30. cm and 40. cm respectively. Static stress variation analysis was performed to analyze possible stress overloads on the closest seismogenic sources. Our results provide insight into the tectonics of the Northern Apennines, suggesting the fundamental role of transfer fault zones in intra-mountain basin origin and in the assessment of seismic hazard in an extensional tectonic regime.

AB - In this study we use Synthetic Aperture Radar Differential Interferometry (DInSAR) and seismological data to constrain the source of the mainshock of the 2013 Lunigiana (North-western Italy) seismic sequence, namely an Mw 5.1 event occurred on 2013 June 21. The sequence took place in a transfer zone located between the Lunigiana (North) and Garfagnana (South) graben. As the destructive Mw 6.2 earthquake occurred in 1920 has demonstrated, this area is seismically active and is considered the most hazardous area of the Northern Apennines.Hypocentre relocations of the Lunigiana sequence aftershocks are well fitted by a ~. 45° N-dipping fault plane, whereas the focal mechanism solution yields a dip-slip mechanism with a slight right-lateral strike-slip component. Surface displacements estimated from ascending COSMO-SkyMed imagery acquired in the time-span of a single day around the mainshock were used to derive an elastic dislocation model. The estimated slip distributions computed on fixed and variable size meshes show peak values of 30. cm and 40. cm respectively. Static stress variation analysis was performed to analyze possible stress overloads on the closest seismogenic sources. Our results provide insight into the tectonics of the Northern Apennines, suggesting the fundamental role of transfer fault zones in intra-mountain basin origin and in the assessment of seismic hazard in an extensional tectonic regime.

KW - CFF variations

KW - InSAR measurements

KW - Lunigiana earthquake

KW - Northern Apennines

KW - Seismic sequence relocation

KW - Seismic source modelling

U2 - 10.1016/j.tecto.2014.09.005

DO - 10.1016/j.tecto.2014.09.005

M3 - Journal article

AN - SCOPUS:84922378671

VL - 636

SP - 315

EP - 324

JO - Tectonophysics

JF - Tectonophysics

SN - 0040-1951

ER -