The Etnean instrumental catalogue collects local earthquakes recorded by the stations belonging to the Permanent Seismic Network, operated by Istituto Nazionale di Geofisica e Vulcanologia-Osservatorio Etneo (INGV-OE), from January 1, 2020. The earthquakes contained within the catalogue are localized by a staff of experienced analysts, working in the seismological division of the INGV-OE. In order to make available to the scientific community a reliable product, the hypocentral localizations satisfy high scientific criteria, which are agreed upon and shared by the staff. The hypocentral parameters of earthquakes are obtained by using several purpose-written softwares, developed by an expert team of the INGV-OE, and the computer program Hypoellipse 2.0 (Lahr, 1989). The crustal velocity model used is the one by Hirn et al. (1991). Each earthquake, and the provided parameters, are stored within a database consisting of a plurality of fields, which can be interrogated, according to the user requirements. The optimal coverage and the density of the seismic network, as well as the high quality of the collected data, ensure a good detection performance, and an accurate hypocentral parameters estimation for the Etna volcanic area. Moreover, the permanent seismic network configuration, also integrated by the stations belonging to the seismic mobile network, allows the determination of the focal mechanisms with the standard FPFIT algorithm (Reasenberg and Oppenheimer, 1985).

The map shows the events located in the last ten days inside the area of competence of INGV-OE.