skip to main content
Idioma:

Liquefaction phenomena associated with the Emilia earthquake sequence of May–June 2012 (Northern Italy)

Group, Emergeo Working

Natural hazards and earth system sciences, 2013-04, Vol.13 (4), p.935-947 [Periódico revisado por pares]

Katlenburg-Lindau: Copernicus GmbH

Texto completo disponível

Citações Citado por
  • Título:
    Liquefaction phenomena associated with the Emilia earthquake sequence of May–June 2012 (Northern Italy)
  • Autor: Group, Emergeo Working
  • Assuntos: Aerial surveys ; Categories ; Channels ; Earthquakes ; Fracture mechanics ; Geological surveys ; Liquefaction ; Seismic phenomena ; Seismic response ; Surveys
  • É parte de: Natural hazards and earth system sciences, 2013-04, Vol.13 (4), p.935-947
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: In this paper we present the geological effects induced by the 2012 Emilia seismic sequence in the Po Plain. Extensive liquefaction phenomena were observed over an area of similar to 1200 km super(2) following the 20 May, M sub(L) 5.9 and 29 May, M sub(L) 5.8 mainshocks; both occurred on about E-W trending, S dipping blind thrust faults. We collected the coseismic geological evidence through field and aerial surveys, reports from local people and Web-based survey. On the basis of their morphologic and structural characteristics, we grouped the 1362 effects surveyed into three main categories: liquefaction (485), fractures with liquefaction (768), and fractures (109). We show that the quite uneven distribution of liquefaction effects, which appear concentrated and aligned, is mostly controlled by the presence of paleo-riverbeds, out-flow channels and fans of the main rivers crossing the area; these terrains are characterised by the pervasive presence of sandy layers in the uppermost 5 m, a local feature that, along with the presence of a high water table, greatly favours liquefaction. We also find that the maximum distance of observed liquefaction from the earthquake epicentre is similar to 30 km, in agreement with the regional empirical relations available for the Italian Peninsula. Finally, we observe that the contour of the liquefaction observations has an elongated shape almost coinciding with the aftershock area, the InSAR deformation area, and the I greater than or equal to 6 EMS area. This observation confirms the control of the earthquake source on the liquefaction distribution, and provides useful hints in the characterisation of the seismogenic source responsible for historical and pre-historical liquefactions.
  • Editor: Katlenburg-Lindau: Copernicus GmbH
  • Idioma: Inglês
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.