Evolution and strengthening of the Calabrian Regional Seismic Network

A D'Alessandro,I Guerra,A Gervasi

doi:10.5194/adgeo-36-11-2013

A D'Alessandro, I Guerra + Show 1 more

Open Access

https://doi.org/10.5194/adgeo-36-11-2013

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Abstract

Abstract. The Calabrian Arc is an area of high seismic hazard, in the past often affected by destructive earthquakes. The seismicity of the Calabrian region is monitored by the Italian National Seismic Network integrated by the Calabrian Regional one and, in the last three years, by the Pollino temporary array. We have applied the Seismic Network Evaluation through Simulation to assess the individual contribution of each network in locating earthquakes with epicentres in the Calabrian region and surrounding. We shows that the Calabrian Regional Seismic Network greatly improves the quality of the coverage in almost the Calabria territory except in the Crotone Basin, in the Serre and in the offshore areas. We show that the contribution of the Pollino temporary array is instead restricted to a very small area centred on the Pollino Chain. Due to the presence in the Serre of important seismogenic volumes, which in the past have generated destructive earthquakes, it would be opportune to add at least several seismic stations in this area and surrounding to improve the seismic monitoring.

Highlights

We shows that the Calabrian Regional Seismic Network greatly improves the qualand 1908
From a geodynamic point of view, Southern Italy is divided characterized by an energy release sufficient to be frequently into two regions: the southern-most, the so-called Calabrian felt by local inhabitants, generating diffuse bother
To evaluate the contribution of the CRSN and of the Pollino temporary array to locate local and regional seismicity we applied the SNES method at different networks configuration: Italian National Seismic Network (INSN), INSN+CSN and INSN+CSN+POLL

Summary

Introduction

Introduction the Calabrian RegionalSeiMsmeicthNoedtwsorakn(CdRSN, Fig. 1a), nCoRwSaNdalyoscactoendsatibtouutetd40by001D05easaetriatshmqSiucaykssteatsteiwomnitshs. eSpinicceen1te9r8i6n the the Calabrian region (Fig. 1b) and contributed significantly to in-Italian seismicity results from the relative motion between tegrate the INSN coverage.the African and Eurasian plates, accommodated by a complex system of faults that developed during the processes of subduction and collision in the Central Mediterranean area.Since almost three yearGs theeoarseca iaet tnhetinfiocrthern boundary of Calabria, tain chain if maMfafrekcoetedddebbylytDhaeedpevrneesseelonsceperimeosfeothfnestePiosmlliincoswmaorumns- MFrom a geodynamic point of view, Southern Italy is divided characterized by an energy release sufficient to be frequently into two regions: the southern-most, the so-called Calabrian felt by local inhabitants, generating diffuse bother (TotaroArc, where the Ionian lithosphere is still subduting beneath the Tyrrhenian Sea and the northern one, the so-called Southern Apennines, that constitute the accretionary prism of the et al, 2012). As showed by D’Alessandro et al (2011a), seismic stations in this area and surrounding to improve the seismic monitoring. We analyzing the location performance of the CRSN and of the Pollino array, integrating the INSN, to show their support in local earthquakes detection and location.

Results

Conclusion