A first look at the Gargano (southern Italy) seismicity as seen by the local scale OTRIONS seismic network

de Lorenzo S
Romeo A
Falco L
Michele M
Tallarico A

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Publication date

January 2014

DOI

10.4401/ag-6594

Publisher

Instituto Nazionale di Geofisica e Vulcanologia, INGV

Abstract

On April 2013, a local scale seismic network, named OTRIONS, composed of twelve short period (1 Hz) three component seismometers, has been located in the northern part of the Apulia (southern Italy). In the first two months of data acquisition, the network recorded about one hundred very small (ML<2) magnitude earthquakes. A three-layer 1D VP velocity model was preliminarily computed, using the recordings of earthquakes occurred in the area in the period 2006-2012 and recorded by the national seismic network of INGV (Istituto Nazionale di Geofisica e Vulcanologia). This model was calibrated by means of a multi-scale approach, based on a global search of the minimum misfit between observed and theoretical travel times. At each step of the i...