Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/1260
Authors: | Del Gaudio, V.* Festa, V.* Ripa, R. R.* Iurilli, V.* Pierri, P.* Calcagnile, G.* Moretti, M.* Pieri, P.* Tropeano, M.* |
Title: | Evidence of Apulian crustal structures related to low energy seismicity (Murge - Southern Italy) | Issue Date: | Oct-2001 | Series/Report no.: | 5-6/44 (2001) | URI: | http://hdl.handle.net/2122/1260 | Keywords: | Bouguer anomalies Murgian plateu low energy seismicity tensional structures |
Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous | Abstract: | The discovery of recent co-seismic sedimentary structures and the detection of low energy seismic activity in the Murgian plateau (Apulia - Southern Italy) motivated a more detailed examination of the tectonics in this part of the Apulian plate commonly believed to be aseismic. In particular, we examined the north-western zone where a seismic sequence with maximum magnitude 3.2 and tensional focal mechanism occurred in 1991. The analysis of the existing gravimetric data, integrated by three new profiles carried out across the epicentral area, disclosed an anomaly possibly due to an old tensional tectonic structure located within the upper crust. Even though the depth and the age hypothesised for the anomaly source would exclude a direct causal connection with the observed seismicity, this structure could be a shallower expression of a tectonic structure extending down to the crystalline basement: it could represent a zone of relative «weakness» where the regional stress, due to the interactions between Apennines and Apulian plate, encounters conditions facilitating the release of seismic energy. |
Appears in Collections: | Annals of Geophysics |
Show full item record
Page view(s)
159
checked on Apr 24, 2024
Download(s) 50
355
checked on Apr 24, 2024