The scary recent seismic activity in the Campi Flegrei volcanic caldera near Italy’s Naples continued overnight with a magnitude 3.9 earthquake that was followed by two others of magnitude 3, ANSA reports.

There was also a magnitude 3.9 quake on Sunday that could be felt by residents in parts of Naples and the surrounding province.

In total there have been over a dozen seismic events in the area in the last three days and schools in the town of Pozzuoli, which is close to the epicentre of the earthquakes, are closed on Monday as a precautionary measure.

The Campi Flegrei area, also known the Phlegrean Fields in English, is currently being affected by bradyseism, or ground uplift, and there have been a series of earthquakes over the last year.

Civil Protection Minister Nello Musumeci has appointed a special commissioner for the Campi Flegrei area to take care of risk-prevention measures.

The minister has complained about how urban development had been allowed in the area.