The multidisciplinary monitoring of the Campi Flegrei continues unabated. A new study by INGV in collaboration with the University of Bari and the Université Savoie Mont Blanc illustrates the possible correlation between gas upwelling and two seismic swarms that occurred in 2015 and 2019.
Better understanding of the processes taking place in Campi Flegrei. This is the objective of the multidisciplinary study conducted by the National Institute of Geophysics and Volcanology (INGV) entitled "Tracking Episodes of Seismicity and Gas Transport in Campi Flegrei Caldera Through Seismic, Geophysical, and Geochemical Measurements”, just published in the journal Seismological Research Letters.
"A systematic review”, explains Flora Giudicepietro, researcher at the INGV Vesuvius Observatory, “it was based on multiparametric analyses, i.e. on the elaboration of data from several disciplines. In particular, seismic data (earthquake and fumarolic tremor parameters), geodetic data (soil uplift) and geochemical data (gas emission in the Pisciarelli area) were correlated: three different categories of information but all necessary to define the state of activity of a volcano and to understand its evolution.
The results of the research made it possible to identify two episodes of seismicity, which occurred on 7 October 2015 and 6 December 2019, in which the recorded data can be interpreted as due to gas inputs in the Campi Flegrei hydrothermal system".
“Through this multidisciplinary analysis”, continues Flora Giudicepietro, “it was possible to highlight that on the two dates in question there were seismic swarms characterized by events with a magnitude greater than the generally very small one of the Phlegrean earthquakes, which were both preceded by an increase in the speed of the soil lifting. Furthermore, the amplitude of the tremor generated by the main fumarole of the Pisciarelli area (near the Solfatara and near the municipal border between Pozzuoli and Naples), highlighted an increase in hydrothermal activity during and after the swarms”.
To precisely determine the amplitude of the fumarolic tremor, the signal of a seismic station positioned just 8 meters away from the Pisciarelli fumarole was used.
"This station", adds the researcher, “has made it possible to collect data that give an indication of the activity of the fumarole in question, which also correlates well with those of the Solfatara. Research continues, to better understand the processes taking place in the Campi Flegrei”, concludes Flora Giudicepietro.
The published research has an essentially scientific value, without immediate implications regarding the aspects of civil protection at the moment.
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INGV, a new study highlights possible relationships between seismic episodes that occurred in 2015 and 2019 and the ascent of gas in Campi Flegrei
The multidisciplinary monitoring of the Campi Flegrei continues unabated. A new study by INGV in collaboration with the University of Bari and the Université Savoie Mont Blanc, illustrates the possible correlation between gas rising and two seismic swarms that occurred in 2015 and 2019.
To better understand the processes taking place in the Campi Flegrei. This is the goal of the multidisciplinary study conducted by the National Institute of Geophysics and Volcanology (INGV) entitled "Tracking Episodes of Seismicity and Gas Transport in Campi Flegrei Caldera Through Seismic, Geophysical, and Geochemical Measurements", just published in the journal Seismological Research Letters.
"The study", explains Flora Giudicepietro, researcher at the Vesuvius Observatory of INGV, "was based on multiparametric analyses, that is, on the processing of data from multiple disciplines. In particular, seismic data (parameters of earthquakes and fumarolic tremor), geodetic data (ground uplift) and geochemical data (gas emission in the Pisciarelli area) were correlated: three different categories of observations but all necessary to define the state of activity of a volcano and to understand its evolution.
The results of the research made it possible to identify two seismic episodes, which took place on 7 October 2015 and 6 December 2019, in which the recorded data can be interpreted as due to gas inputs in the hydrothermal system of the Campi Flegrei".
"Through this multidisciplinary analysis", continues Flora Giudicepietro, "it was possible to highlight that in the two dates under examination there were seismic swarms characterized by events with a magnitude greater than the generally very small one of the Phlegraean earthquakes, which were both preceded by an increase in ground uplift rate. In addition, the amplitude of the tremor generated by the main fumarole in the Pisciarelli area (near the Solfatara and near the municipal border between Pozzuoli and Naples), highlighted an increase in hydrothermal activity during and after the swarms".
To accurately determine the amplitude of the fumarolic tremor, the signal of a seismic station located just 8 meters away from the Pisciarelli fumarole was used.
"This station", adds the researcher, "made it possible to collect data that give an indication of the activity of the fumarole in question, which also correlates well with those of the Solfatara. Research continues to better understand the processes taking place in the Campi Flegrei”, concludes Flora Giudicepietro.
The published research has an essentially scientific value, currently devoid of immediate implications regarding the aspects of civil protection.
Link: https://pubs.geoscienceworld.org/ssa/srl/article-abstract/doi/10.1785/0220200223/593274/Tracking-Episodes-of-Seismicity-and-Gas-Transport?redirectedFrom=fulltext