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Authors: | Tarabusi, G.* Caputo, R.* |
Title: | The use of HVSR measurements for investigating buried tectonic structures: the Mirandola anticline, Northern Italy, as a case study | Journal: | International journal of earth sciences | Series/Report no.: | 1/106(2016) | Publisher: | Springer Verlag New York Inc | Issue Date: | Apr-2017 | DOI: | 10.1007/s00531-016-1322-3 | Keywords: | Seismic Hazard HVSR Blind anticline Po Plain Seimotectonics Single-station microtremor |
Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution 04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics |
Abstract: | The Mirandola Anticline represents a buried fault-propagation fold which has been growing during Quaternary due to the seismogenic activity of a blind segment belonging to the broader Ferrara Arc. The last reactivation occurred during the May 2012 Emilia sequence. In correspondence with this structure the thickness of the marine and continental deposits of the Po Plain foredeep is particularly reduced. In order to better define the shallow geometry of this tectonic structure, and hence its recent activity, we investigated in a depth range which is intermediate between the surficial morphological observations and seismic profiles information. In particular, we carried out numerous passive seismic measurements (single station microtremor) for obtaining the horizontal to vertical spectral ratio (HVSR). The results of a combined analysis of the peak frequency and its amplitude nicely fit the available geological information suggesting that this low-cost geophysical technique could be successfully applied in other sectors of wide morphologically flat alluvial plains to investigate blind and completely buried potential seismogenic structures |
Appears in Collections: | Article published / in press |
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