Preprints
https://doi.org/10.5194/se-2019-25
https://doi.org/10.5194/se-2019-25
15 Feb 2019
 | 15 Feb 2019
Status: this preprint was under review for the journal SE but the revision was not accepted.

Seismic Hazard of L'Aquila downtown (central Italy): new insights for 3D geological model based on high-resolution seismic reflection profile and borehole stratigraphy

Marco Tallini, Marco Spadi, Domenico Cosentino, Marco Nocentini, Luca Macerola, Giuseppe Cavuoto, and Vincenzo Di Fiore

Abstract. On 6 April 2009, a Mw 6.1 earthquake struck the Plio-Quaternary intermontane L'Aquila Basin in central Italy, causing strong damages in L'Aquila historical downtown and surroundings, which were affected by notable site effects. Previous works have suggested that different site effects may be related to the complex subsurface geologic architecture, given by the variability of thickness and lithology of L'Aquila Basin clastic deposits, on which the city was built. To improve the 3D geological model of L'Aquila downtown for seismic site response evaluation and to estimate the Seismic Hazard of possible buried active normal faults, a multitask project has been carried out consisting mainly of the integration of subsurface dataset, including geological and geophysical surveys. Data have been interpreted with the aim to conceive and build a detailed model for the Plio-Quaternary cover of the continental basin and the buried morphology of the Meso-Cenozoic bedrock. We report the results concerning the interpretation of a 1 km-long high-resolution seismic reflection profile and refraction tomography integrated with the stratigraphy from deep and shallow boreholes. The results allowed us to reconstruct the Plio-Quaternary succession below L'Aquila downtown. The Plio-Quaternary depocentre corresponds to a minor NNW-SSE graben, which is developed within the main regional graben that borders L'Aquila Basin. Finally, data interpretation allowed to reconstruct the Plio-Quaternary tectono-stratigraphic evolution of the basin, to evidence the recent activity of several faults, and to define the subsoil geological model of the study area. All these data, which are functional to define the seismic site effects and to detect the activity of faults, are useful to mitigate the Seismic Hazard of cultural heritage cities of central Italy, such as the case study of L'Aquila downtown.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Marco Tallini, Marco Spadi, Domenico Cosentino, Marco Nocentini, Luca Macerola, Giuseppe Cavuoto, and Vincenzo Di Fiore
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Marco Tallini, Marco Spadi, Domenico Cosentino, Marco Nocentini, Luca Macerola, Giuseppe Cavuoto, and Vincenzo Di Fiore
Marco Tallini, Marco Spadi, Domenico Cosentino, Marco Nocentini, Luca Macerola, Giuseppe Cavuoto, and Vincenzo Di Fiore

Viewed

Total article views: 1,268 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
824 360 84 1,268 80 81
  • HTML: 824
  • PDF: 360
  • XML: 84
  • Total: 1,268
  • BibTeX: 80
  • EndNote: 81
Views and downloads (calculated since 15 Feb 2019)
Cumulative views and downloads (calculated since 15 Feb 2019)

Viewed (geographical distribution)

Total article views: 977 (including HTML, PDF, and XML) Thereof 977 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Discussed

Latest update: 23 May 2024
Download
Short summary
The interpretation of a 1 km-long high-resolution seismic reflection profile integrated with borehole stratigraphy was useful to reconstruct the geological subsoil model of L'Aquila downtown which was struck by the 6/4/2009 Mw 6.1 earthquake, and thus to provide indication on the seismic site effects and the faults activity. This information was essential to design urban masterplan able to mitigate the Seismic Hazard of cultural heritage cities of central Italy, such as the case study site.