Bollettino Sismico Italiano (BSI), I quadrimestre 2017 (versione 2)

Bollettino Sismico Italiano, I quadrimestre 2017, version 2.0 contains 25241 earthquake locations in the Italian region in the time frame between 01-01-2017 and 30-04-2017, locations refer to earthquakes located by INGV. We include in this count the earthquakes of the central Italy sequence (23265) started on August 24th revised from the Italian seismic bulletin and available in the ISIDe database from July 2019. We revised all the earthquakes of the sequence with M>=2.3, except from January 18th where we revised all earthquakes without magnitude threshold. The revised events include earthquakes with magnitude greater than 1.5 (11315), 66 of them with M>=3.5; to locate the earthquakes we used 438 stations which contributed to the locations with 82851 P phases and 51136 S phases. Data have been recorded by the National Seismic Network, operated by Istituto Nazionale di Geofisica e Vulcanologia (INGV) and regional and international networks operated by several providers. The Bollettino Sismico Italiano is available in Quakeml format and is described on a 4 months basis by a pdf document, but is also available in the ISIDe data-base for the period 1985-today. Both Quakeml files and pdf document are available at CNT webpage (http://terremoti.ingv.it/bsi).