The Italian National Seismic Network and the earthquake and tsunami monitoring and surveillance systems

Abstract

Abstract. The Istituto Nazionale di Geofisica e Vulcanologia (INGV) is an Italian research institution, with focus on Earth Sciences. INGV runs the Italian National Seismic Network (Rete Sismica Nazionale, RSN) and other networks at national scale for monitoring earthquakes and tsunami as a part of the National Civil Protection System coordinated by the Italian Department of Civil Protection (Dipartimento di Protezione Civile, DPC). RSN is composed of about 400 stations, mainly broadband, installed in the Country and in the surrounding regions; about 110 stations feature also co-located strong motion instruments, and about 180 have GPS receivers and belong to the National GPS network (Rete Integrata Nazionale GPS, RING). The data acquisition system was designed to accomplish, in near-real-time, automatic earthquake detection, hypocenter and magnitude determination, moment tensors, shake maps and other products of interest for DPC. Database archiving of all parametric results are closely linked to the existing procedures of the INGV seismic monitoring environment and surveillance procedures. INGV is one of the primary nodes of ORFEUS (Observatories & Research Facilities for European Seismology) EIDA (European Integrated Data Archive) for the archiving and distribution of continuous, quality checked seismic data. The strong motion network data are archived and distributed both in EIDA and in event based archives; GPS data, from the RING network are also archived, analyzed and distributed at INGV. Overall, the Italian earthquake surveillance service provides, in quasi real-time, hypocenter parameters to the DPC. These are then revised routinely by the analysts of the Italian Seismic Bulletin (Bollettino Sismico Italiano, BSI). The results are published on the web, these are available to both the scientific community and the general public. The INGV surveillance includes a pre-operational tsunami alert service since INGV is one of the Tsunami Service providers of the North-eastern Atlantic and Mediterranean Tsunami warning System (NEAMTWS).

AlpArray-Italy: Site description and noise characterization

“…All stations but Z3.A316A (Montecristo) have been turned real-time using UMTS and are currently contributing to the Seismic National Network monitoring system and to the bulletin (Michelini et al, 2016). The real-time acquisition rates are order of 99 % in best sites and a few sites experiencing transmission problems due to insufficient UMTS signal or service quality will be optimized soon after the summer.…”

Heterogeneous Behavior of the Campotosto Normal Fault (Central Italy) Imaged by InSAR GPS and Strong-Motion Data: Insights from the 18 January 2017 Events

“…The two largest shocks of magnitude M W 5.5 and 5.4, were well recorded by 11 and 14 strong-motion stations in the near-source, respectively, belonging to the RAN (Rete Accelerometrica Nazionale, http://ran.protezionecivile.it/IT/index.php) and to the INGV [48,49] accelerometric networks ( Figure 3f). The accelerograms were processed to remove the instrument response, band-pass filtered between 0.02-0.5 Hz, and time integrated to obtain ground velocity histories.…”

Complex Fault Geometry and Rupture Dynamics of the MW 6.5, 30 October 2016, Central Italy Earthquake

“…We inverted the strong motion recordings of 36 three‐component, digital accelerometers belonging to the National Accelerometric Network (Rete Accelerometrica Nazionale, http://ran.protezionecivile.it/IT/index.php) of the Italian Department of Civil Protection, and to the National Seismic Network (Rete Sismica Nazionale) of INGV (Michelini et al, ; Moretti et al, ). These stations were all located within 45 km from the epicenter (Figure ).…”