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Complete seismic release of tectonic strain and earthquake recurrence in the Apennines (Italy)

D'Agostino, N.

Geophysical research letters, 2014-02, Vol.41 (4), p.1155-1162 [Periódico revisado por pares]

Washington: Blackwell Publishing Ltd

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  • Título:
    Complete seismic release of tectonic strain and earthquake recurrence in the Apennines (Italy)
  • Autor: D'Agostino, N.
  • Assuntos: Apennines ; crustal deformation ; Earthquakes ; Estimates ; Geodesy ; GPS ; Seismic phenomena ; Seismicity ; Spatial distribution ; Strain ; Strain rate ; Tectonics
  • É parte de: Geophysical research letters, 2014-02, Vol.41 (4), p.1155-1162
  • Notas: Supporting InformationSupporting Information
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  • Descrição: Here I compare estimates of tectonic strain rates from dense Global Positioning System measurements with the seismicity released in the last ~500 years in the Apennines (Italy). The rates of seismic moment accumulation from geodesy and of historical seismic release by earthquakes agree within the uncertainties, ruling out significant aseismic deformation. Within the considered 400 km long section of the Apennines, this balance yields an average recurrence interval of 30–75 years for MW≥6.5 events without requiring a future earthquake larger than those observed historically (MW~7). A minimum estimate of unreleased strain allows MW≥6.5 and MW≥6.9 events to be released in ~35% and ~10% of the central‐southern Apennines, respectively. The definition of the seismic potential for smaller events is more uncertain, and their occurrence remains a significant threat throughout the Apennines. Key PointsActive crustal extension is completely released by earthquakes in the ApenninesLast 500 years provide a representative sample of Apennines long‐term seismicityMinimum estimate of unreleased strain spatial distribution since 1550
  • Editor: Washington: Blackwell Publishing Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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