Bollettino Sismico Italiano (BSI), I quadrimestre 2018

Italian Seismic Bulletin (BSI), First quarter 2018, version 1.0.
In this issue we publish the earthquakes that occurred in Italy in the period January - April 2018; they include the events belonging to the seismic sequence of central Italy started on August 24, 2016 with the earthquake of Amatrice (Magnitude 6), called sequence of Amatrice-Visso-Norcia (AVN in the following).
The BSI Working Group reviewed all earthquakes of magnitude M>=2.3 belonging to AVN, and all earthquakes of magnitude M>=1.5 occurring in other Italian areas. This issue includes a total of 9473 events, of which 7266 belong to the AVN sequence. 1911 of them have magnitude M>=1.5 and 8 have magnitude M >=3.5. Earthquakes located outside the sequence are 2207, of which 1075 with M>= 1.5 and 21 with M>=3.5. This BSI publication includes 37826 P phases and 27872 S phases; these include 23187 P phases and 18184 S phases generated by AVN sequence.
The data were recorded by 470 stations belonging to the Italian National Seismic Network, managed by the National Institute of Geophysics and Volcanology (INGV), and to other regional and international networks managed by different providers. The localizations and phases of the Italian Seismic Bulletin are available on a quarterly basis in Quakeml format at http://terremoti.ingv.it/bsi but are also available, since 1985 to the present, in the ISIDe database at http://terremoti.ingv.it/.