Seismic tremor beneath the caldera has been picking up (image: INGV)
A swarm of small earthquakes has been occurring under Europe’s most active caldera over the past day to hours.
The INGV seismic instrument recorded internal continuous vibrations (so-called tremor) beginning at 23:57 UTC last night. Earthquakes have been more frequent between Pozzuoli and Bagnoli areas today. About 120 quakes have been monitored within eight hours, of which one was located with a maximum magnitude of 3.6.
However, the volcano observatory issued that the seismic swarm ceased some time today.
Today’s swarm is among the strongest beneath the caldera since the seismic crisis during 1982-1984.
Source: Istituto Nazionale di Geofisica e Vulcanologia volcano activity update 18 August 2023
Quakes under the Campi Flegrei volcano have been intensifying today (red dots) (image: INGV)