The main purpose of this work is to investigate the performances of a different automatic procedure to improve the quasi- real time earthquakes locations.
Etna, the seismic network is managed by INGV and the quasi- real time earthquakes locations are performed by using an automatic-picking algorithm based on short-term-average to long-term-average ratios (STA/LTA) calculated from an approximate squared envelope function of the seismogram, which furnish a list of P-wave arrival times, and the location algorithm Hypoellipse, with a 1D velocity model. The reliability of an automatic location algorithm is influenced by several factors such as errors in picking seismic phases, network geometry, and velocity model uncertainties. Tuve', T.Īutomatic procedure for locating earthquake in quasi- real time must provide a good estimation of earthquakes location within a few seconds after the event is first detected and is strongly needed for seismic warning system. Near- real time 3D probabilistic earthquakes locations at Mt.
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