The 2012-2015 seismicity of the Sannio-Irpinia border region (Southern Italy) Ada De Matteo (1), Bruno Massa (1,2), Girolamo Milano (2), and Luca D’Auria (2,3) (1) Universita` degli Studi del Sannio, Dipartimento di Scienze e Tecnologie, Benevento, Italy (
[email protected]); (2) Istituto Nazionale di Geofisica e Vulcanologia, sezione di Napoli Osservatorio Vesuviano, Napoli, Italy (
[email protected]); (3) Consiglio Nazionale delle Ricerche, Istituto per il Rilevamento Elettromagnetico dell'Ambiente 13°30' 14°00' 14°30' 15°00' 15°30' 16°00' 16°30' 17°00' 43°00' 43°00' 1. INTRODUCTION N The Sannio and Irpinia seismogenic regions fall in the axial-frontal sector of the Southern Apennine belt (Fig. 1). These regions 42°30' 42°30' have been struck by several historical destructive earthquakes as the most recent 1962 and 1980. Looking at the border between these two areas historical destructive earthquakes, with Io≥ IX MCS, occurred in 1456, 1702, 1732. Although the location, geometry and kinematics of the causative faults of these earthquakes are still matter of debate, at present almost three main 42°00' 42°00' hypotheses of active faults related to these strong earthquakes have been proposed: the Miranda-Apice, the Pago Veiano- 9 10 Montaguto and the Mirabella Eclano-Monteverde (Fig.1; DISS Working Group, 2015). These three structures would cross the Isernia Sannio-Irpinia seismogenic border. 41°30' Campobasso 41°30' Foggia 1 2 8 Ariano Irpino Benevento 3 41°00' Caserta 41°00' 2. DATA AND RESULTS 4 7 6 5 In order to characterize the seismicity of the Sannio-Irpinia border, we studied the present-day seismicity 40°30' 40°30' recorded by the Italian National Seismic Network of the INGV (Fig.