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The last eruption of the supervolcano took place back in 1538, but was much smaller in scale. The blast did, however, create a new hill – Monte Nuovo.
Since 2005 scientists have been detecting an increase of low-level activity and heating, as well as ground and magma deformation in the area. In 2012 the status of the volcano was changed from ‘green’ (quiet) to ‘yellow’ (scientific attention).
"These areas can give rise to the only eruptions that can have global catastrophic effects comparable to major meteorite impacts," Giuseppe De Natale, head of a project to monitor the volcano, told Reuters back in 2012.
Here we use the results of physical and volatile saturation models to demonstrate that magmatic volatiles released by decompressing magmas at a critical degassing pressure (CDP) can drive volcanic unrest towards a critical state. We show that, at the CDP, the abrupt and voluminous release of H2O-rich magmatic gases can heat hydrothermal fluids and rocks, triggering an accelerating deformation that can ultimately culminate in rock failure and eruption. We propose that magma could be approaching the CDP at Campi Flegrei, a volcano in the metropolitan area of Naples, one of the most densely inhabited areas in the world, and where accelerating deformation and heating are currently being observed.
All we can do is hope like hell it dies down and goes back to sleep.
Magma chamber of the Campi Flegrei supervolcano at the time of eruption of the Campanian Ignimbrite
Paola Marianelli1, Alessandro Sbrana1 and Monica Proto1
1Dipartimento di Scienze della Terra, Università degli Studi di Pisa, via Santa Maria 53, 56126 Pisa, Italy
A supereruption that occurred in the Campi Flegrei area, Italy, ca. 39 ka had regional- and global-scale environmental impacts and deposited the Campanian Ignimbrite (CI). We attempt to shed light on critical aspects of the eruption (depth of magma chamber, intensive pre-eruptive magma conditions) and the large-volume magma plumbing system on the basis of information derived from analyzing melt inclusion (MI) data. To achieve these aims, we provide new measurements of homogenization temperatures and values of dissolved H2O within phenocryst-hosted MIs from pumices erupted during different phases of the CI eruption. The MI data indicate that a relatively homogeneous overheated trachytic magma resided within a relatively deep magma chamber. Dissolved water contents in MIs indicate that prior to the eruption the magma chamber underwent radical changes related to differential upward movement of magma. Decompression of the rising trachytic magma caused a decrease in water solubility and crystallization, and trachytic bodies were emplaced at very shallow depths. The proposed eruptive model links portions of the main magma chamber and apophyses with specific eruptive units.
As discussed earlier, magma chambers volumes are best constrained by caldera-related
extrusive volumes. It should be safe to assume that the magma chambers are of a larger volume
than their caldera-related extrusions, but by how much remains unknown.
In Campi Flegrei area the analysis with array methods of data recorded by ARF array permitted the discovery of low amplitude volcanic tremor of hydrothermal origin occurred in January 2015, a seismic signal never observed before in the area.
originally posted by: ressiv
thank you....only proofed that ATS is focused to certain posters
loll no hard feelings...:-)) TA is much moore expert than I...
only pleased that the Campi is now taking serious...!
go on TA
a reply to: tigertatzen