The subduction structure of the northern Apennines: Results from the RETREAT seismic deployment

Lucia Margheriti, Silvia Pondrelli, Davide Piccinini, Nicola Piana Agostinetti, Luciano Giovani, Simone Salimbeni, Francesco Pio Lucente, Alessandro Amato, Paola Baccheschi, Jeffrey Park, Mark Brandon, Vadim Levin, Jaroslava Plomerová, Petr Jedlička, Luděk Vecsey, Vladislav Babuška, Andrea Fiaschi, Bruno Carpani, Pete Ulbricht

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16 Citations (Scopus)


The project Retreating-trench, extension, and accretion tectonics, RETREAT, is a multidisciplinary study of the Northern Apennines (, funded by the United States National Science Foundation (NSF) in collaboration with the Italian Istituto Nazionale di Geofisica e Vulcanologia (INGV) and the Grant Agency of the Czech Academy of Sciences (GAAV). The main goal of RETREAT is to develop a self-consistent dynamic model of syn-convergent extension, using the Northern Apennines as a natural laboratory. In the context of this project a a passive seismological experiment was deployed in the fall of 2003 for a period of three years. RETREAT seismologists aim to develop a comprehensive understanding of the deep structure beneath the Northern Apennines, with particular attention on inferring likely patterns of mantle flow. Specific objectives of the project are the crustal and lithospheric thicknesses, the location and geometry of the Adriatic slab, and the distribution of seismic anisotropy laterally and vertically in the lithosphere and asthenosphere. The project is collecting teleseismic and regional earthquake data for 3 years. This contribution describes the RETREAT seismic deployment and reports on key results from the first year of the deployment. We confirm some prior findings regarding the seismic structure of Central Italy, but our observations also highlight the complexity of the Northern Apennines subduction system.
Original languageEnglish
Pages (from-to)1119 - 1131
Number of pages13
JournalAnnals of Geophysics
Issue number4-5
Publication statusPublished - Aug 2006
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Geophysics

Cite this

Margheriti, L., Pondrelli, S., Piccinini, D., Agostinetti, N. P., Giovani, L., Salimbeni, S., ... Ulbricht, P. (2006). The subduction structure of the northern Apennines: Results from the RETREAT seismic deployment. Annals of Geophysics, 49(4-5), 1119 - 1131.