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Campi Flegrei volcano (Italy): inflation and weak volcanic unrest continue

Wed, 2 Mar 2022, 17:48
17:48 PM | BY: T
Locations and frequency of quakes, ground inflation at RITE station and CO2 flux in Jan 2022 (image: OV-INGV)
Locations and frequency of quakes, ground inflation at RITE station and CO2 flux in Jan 2022 (image: OV-INGV)
Weak volcanic unrest continues with little variation over the past months at the caldera volcano. Ground inflation continues at steady rates of up to 1 cm per month, centered in the Pozzuoli area, and micro-seismic and degassing activity remain elevated.
From the latest report of the volcano observatory in Naples (Osservatorio Vesuviano, OV-INGV) for Jan 2022:
During January 2022, there were 260 small earthquakes in the Campi Flegrei area. 227 events (about 87% of the total) had a magnitude lower than 1.0, 8 events (about 3%) had a magnitude between 1.0 and 1.9, and there was only 1 event of magnitude around 2.5.
In the case of 24 quakes (about 9.2%), it was not possible to determine the magnitude due to the low amplitude of the signal not clearly distinguishable from the background noise. In total, 133 events were located (51% of those recorded) located mainly between Pozzuoli, Astroni, the Solfatara-Pisciarelli-Agnano area and the Gulf of Pozzuoli with depths strongly concentrated in the first 3 km and a maximum depth of about 4.2 km.
The soil deformation monitoring networks confirm a radial geometry of uplift centered in the Pozzuoli area with an average speed of about 10 ± 2 mm / month. The total uplift recorded at the GPS station in Rione Terra (RITE) stands at about 90 cm since November 2005, of which about 56 cm uplift occurred since January 2016.
The thermographic measurements in the monitored areas show substantially stable temperature trends. The geochemical parameters confirm the multi-year heating and pressurization trends of the hydrothermal system. The flow of CO2 from the soil, in the Solfatara area, is confirmed to be around 3000 tons per day, values ​​comparable to those found in the plume of active volcanoes with persistent degassing.

Previous news

Sat, 13 Nov 2021, 16:59

Campi Flegrei volcano (Italy): micro-seismic activity picks up

Quakes under the Campi Flegrei volcano in Italy since Oct 2021 (image: INGV)
Another weak seismic swarm is in progress under Europe's most active caldera. Since yesterday, 12 weak earthquakes have occurred at shallow depths of mostly around 2 km under the ground since yesterday. ... Read all
Mon, 27 Apr 2020, 12:05

Campi Flegrei volcano (Italy): Seismic swarm reported

Location of earthquakes (C) INGV
A seismic swarm occurred beneath the Phlegrean Fields. This swarm began at 03:51 on 26/04/2020 and was made up of 34 earthquakes with magnitudes ranging from 0.0 to 3.1 and hypocentral depth between 1-2 km. There have been no new fumarole openings reported. ... Read all
Show more
Caldera 458 m
Italy, 40.83°N / 14.14°E
Current status: restless (2 out of 5) Campi Flegrei (Phlegrean Fields) volcano eruptions:
Campanian Ignimbrite eruption ca. 36,000 y.BP, Napoletanian Tuff eruption ca. 15,000 y.BP, 1st. activity epoch 15,000-9,500 y.BP, 2nd activity epoch 8,600-8,200 y.BP, 3rd activity epoch 4,800-3,800 y.BP, 1158 AD (Solfatara eruption), 1538 AD (Monte Nuovo eruption)
Typical eruption style
Highly explosive, caldera-forming eruptions.

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