INGV communication scheme for earthquakes of magnitude equal to or greater than 3.0 towards DPC and towards the public.
Communications, to DPC, of the preliminary parameters of a seismic event of magnitude Ml ≥ 3.0 occur 2 and 5 minutes after the earthquake occurred. These data are disseminated via the web and social media at the same time, if the parameters are of good quality and therefore such as to guarantee a low discrepancy between the automatic determination and that calculated by the seismologists of the INGV Surveillance Rooms.
The staff on duty in the Halls, in fact, analyze the seismic signals and communicate the parameters of the earthquake that occurred (the time of origin of the earthquake, its geographical coordinates, its hypocentral depth and an estimate of the magnitude) within 30 minutes of the earthquake happening , on average within 12 minutes.
Communication between the INGV Rooms and the DPC provides for the seismic event announcement by phone call and e-mail and the sending of text messages. At the same time as the communications to DPC, the information is also published on the INGV website, on the blog and on the INGVterremoti social media.
For each localized earthquake, informative web pages are published which integrate all the INGV databases available for the area affected by the earthquake: historical earthquakes, instrumental seismicity of recent years, accelerometric data (shakemaps), information relating to the of the population (haisentitoilterremoto.it).
This information is the same that is reported in the Event Reports that INGV sends to DPC for all earthquakes with a magnitude Ml≥ 4.0 that occur on the national territory. An initial Report is sent within 1 hour, while a second Detailed Report is drawn up in the following hours, also containing elaborations and analyzes on the ongoing phenomenon.