Abstract
Abstract. We plan to deploy in the Taranto Gulf some Ocean Bottom broadband Seismometer with Hydrophones. Our aim is to investigate the offshore seismicity of the Sibari Gulf. The seismographic network optimization consists in the identification of the optimal sites for the installation of the offshore stations, which is a crucial factor for the success of the monitoring campaign. In this paper, we propose a two steps automatic procedure for the identification of the best stations geometry. In the first step, based on the application of a set of a priori criteria, the suitable sites to host the ocean bottom seismic stations are identified. In the second step, the network improvement is evaluated for all the possible stations geometries by means of numerical simulation. The application of this procedure allows us to identify the best stations geometry to be achieved in the monitoring campaign.
Highlights
The Pollino Massif (Southern Italy) is a stocky mountain chain, triangle-shaped and E–W oriented which marks the transition from the Southern Apennines to the Calabrian Arc
We considered only the Radius of the Equivalent Sphere (RES) parameter because it takes into account both epicentral and hypocentral depth errors, and is the best parameter to quantify the performance of a seismic network
The main reason is the poor distribution of the seismic network sensors due to the elongated shape of the Calabrian arc and in the lack of offshore stations
Summary
The Pollino Massif (Southern Italy) is a stocky mountain chain, triangle-shaped and E–W oriented which marks the transition from the Southern Apennines to the Calabrian Arc. The Moment Tensor Solutions (MTS) available in this area (Fig. 1b, European-Mediterranean CMT catalog; Ekström et al, 2012) mainly yields normal faults with coherent Southern Apenninic trend. This remains true for several tens of Fault Plane Solutions of the dense seismic sequence, which interested the western Pollino area in the years 2010–2012 (Totaro et al, 2013). There are only a few MTS in this south-eastern part of the area; two of them show the right strike slip kinematics of the associated events, with of the possible fault planes coherent with the Southern Apenninic trend, while the third one derives from a thrust event in the perpendicular direction. The morphology presents some Southern Apenninic trend: the Pollino Massif crests and valley do show it, as well as the shore direction from the Sibari Plain up to Cirò Marina
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