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Location map of the Phlegrean Fields
Location map of the Phlegrean Fields

News
Earthquakes at the Campi Flegrei during the past 12 months (red: past week) (image: OV)
Thursday, Nov 21, 2019
No significant variations in monitored activity have been occurring at the Campi Flegrei recently, according to the most recent report of the volcanological observatory (OV). ... [Leer más]
Inflation of the ground by about 10 cm since 1 Jan 2012 (OV / INGV)
Wednesday, Feb 06, 2013
Un nuevo ducto fumarola se ha detectado recientemente en los Campi Flegrei en el campo hidrotermal de Pisciarelli. El nuevo ducto fue visto expulsar gas caliente así como géiser-como fuentes de agua 4-5 metros de altura. Esto inevitablemente activará encabezados en la prensa sobre la posibilidad de una erupción volcánica en la zona, sin embargo, se debe mirar en un contexto que dichos fenómenos son una parte normal del comportamiento de sistemas hidrotermales (muy) activos como el Campi Flegrei. ... [Leer más]
Satellite view of the Campi Flegrei; the Gulf of Pozzuoli in the foreground, parts of the Gulf of Naples and the city of Naples in the right background
Satellite view of the Campi Flegrei; the Gulf of Pozzuoli in the foreground, parts of the Gulf of Naples and the city of Naples in the right background
 

Campi Flegrei (Phlegrean Fields) volcano

Caldera 458 m
Italia, 40.83°N / 14.14°E
Current status: restless (2 out of 5)
Campi Flegrei (Phlegrean Fields) webcams / datos en tiempo real | Reports
Campi Flegrei (Phlegrean Fields) volcano books | Tours
Last update: 21 Nov 2019 (intense degassing and fumarolic activity, small earthquake swarms, slow ground inflation)
Typical eruption style: Altamente
Erupciones del volcán Campi Flegrei (Phlegrean Fields): 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)
Fecha / HoraRevista / ProfundidadDistanciaUbicación
Fri, 6 Dec 2019
Fri, 6 Dec 00:50 UTCM 1.5 / 3 km1 km5 km E Pozzuoli (NA) (Italy)
Fri, 6 Dec 00:17 UTCM 2.8 / 1.8 km1 km6 km E Pozzuoli (NA) (Italy)
Wed, 20 Nov 2019
Wed, 20 Nov 03:44 UTCM 1.7 / 1.7 km1 km3 km SE Pozzuoli (NA) (Italy)
The Campi Flegrei ("burning fields") or Phlegrean Fields is a large, 13-km-wide nested caldera located under the western outskirts of the citiy of Naples and under the Gulf of Pozzuoli. It contains many volcanic centers (cinder cones, tuff rings, calderas) that have been active during the past 30-40,000 years. The volcanic field has been the site of some extremely violent eruptions in the past, although the few ones that occurred during historic times were small events. Today, there is no sign of imminent reawakening of activity, although there are abundant signs of the presence of a still active magma chamber in the forms of solfataras, warm springs, gas emissions etc. In particular, the Campi Flegrei is infamous for its frequent episodes of major ground deformation in the form of large-scale up- and downlift of the ground (bradisism, see below).

Background:

Eruptive history
The earliest known eruptive products are dated 47,000 years before present (BP). The Campi Flegrei caldera formed following two large explosive eruptions, the massive Campanian ignimbrite about 36,000 years BP, and the >40 cu km Neapolitan Yellow Tuff (NYT) about 15,000 years BP. Following eruption of the NYT a large number of eruptions have taken place from widely scattered subaerial and submarine vents. Most activity occurred during three intervals: 15,000-9500, 8600-8200, and 4800-3800 years BP. Two eruptions have occurred in historical time, one in 1158 at Solfatara and the other in 1538 that formed the Monte Nuovo cinder cone.

Bradisim
Episodes of dramatic uplift and subsidence within the caldera have occurred since Roman times. Evidence of this can be seen at many places, e.g. at the submerged ruins of a Roman city offshore the small town of Baia. The most recent episodes of uplift ones took place from 1969-72 and 1982-84, when the inhabitants of the area, Pozzuoli in particular, were witness to and victims of a phenomenon where the earth's surface rose; within a few months it had risen by a total of 3.5 m. This phenomenon is called bradisism (literally a slow movement of the earth's surface, as opposed to fast movement due to an earthquake).
The place which, more than any other, can be considered the evidence over the centuries of Phlegraean bradisim is the macellum (a market of the Roman period, better known as the Temple of Serapide) situated close to the port of Pozzuoli. The remains of this building (which dates back to the end of the first century A.D.) have been very useful in reconstructing the development of bradisism thanks to the holes made by lithodomes (sea molluscs which live in coastal areas on the shore line between high and low tide) on the columns which provide evidence of the variations in ground level as compare to sea level, from the IV century A.D. onwards.

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Sources: adapted from GVP, Smithsonian Institution and the website of the Vesuvius Observatory


Latest satellite images


See also: Sentinel hub | Landsat 8
The Averna caldera lake
The Averna caldera lake
The Macellum at Pozzuoli where evidence of recent uplift can be seen on the columns
The Macellum at Pozzuoli where evidence of recent uplift can be seen on the columns
Bubbling mud pool inside the Solfatara crater
Bubbling mud pool inside the Solfatara crater
The new harbour quai of Pozzuoli, constructed at a lower level after the recent uplifts in 1982-1984
The new harbour quai of Pozzuoli, constructed at a lower level after the recent uplifts in 1982-1984
Hot solfatara inside Solfatara crater
Hot solfatara inside Solfatara crater
View into the crater of Monte Nuovo (1538 eruption)
View into the crater of Monte Nuovo (1538 eruption)
 

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