Campi Flegrei, Ingv: “Other seismic phenomena cannot be ruled out”

The INGV recalls that during the bradyseismic crisis of 1982-84, 1,300 seismic events per month were exceeded. Currently, however, around 450 events have been recorded in the last month

NAPLES – “At present there is no increase in the lifting speed which is currently 2 cm/month. Still at present, there are no changes in the trend in horizontal deformations or deformations different soil spaces compared to the previous trend”. This is one of the passages contained in a note that the National Institute of Geophysics and Volcanology released during the night in relation to the seismic swarm which has been underway in the area of the Campi Flegrei and which, up to 00:31 on May 21st, “preliminarily recorded approximately 150 earthquakes with duration magnitude (Md) = 0.0 (95 localized) and a maximum magnitude (Md) of 4.4 (±0.3). The Md 4.4 event was the most energetic among those recorded since the beginning of the current bradyseismic crisis that began in 2005. 2.6 km“.
The INGV recalls that during the bradyseismic crisis of 1982-84 the ground lifting reached 9 cm per month, and 1,300 seismic events per month were also exceeded. “Currently, however, approximately 450 events with Md=0.0 have been recorded in the last month.”

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The geochemical parameters measured with the continuous stations (Temperature and carbon dioxide flows) do not show significant variations compared to the trends of recent months, other than the well-known increase in temperature and pressure that characterizes the hydrothermal system.
Seismicity, it is underlined in the note, is not a predictable phenomenon, therefore “it cannot be ruled out that other seismic events may occur, even of similar energy to what has already been recorded during the current swarm“.
The INGV Vesuvius Observatory continues its ordinary and extraordinary monitoring activities to identify even the smallest variations in the monitoring parameters useful for better defining the current phenomenon underway. The INGV structures dedicated to monitoring the Campi Flegrei caldera area “are always operational 24 hours a day and on May 21st measurements and sampling will be carried out in some sites of the caldera”.
The INGV, with its Section of Naples Osservatorio Vesuviano, is “constantly in contact with the national and regional Civil Protection and with the interested Municipalities, as well as with all the Authorities competent for the protection of the territory”.