Stromboli volcanic activity variations inferred from observations of fluid geochemistry: 16 years of continuous monitoring of soil CO 2 fluxes (2000-2015)

Abstract Stromboli volcano is characterized by a persistent strombolian activity that was interrupted by effusive eruptions in 1985, 2002–2003, 2007, and 2014. The considerable amount of soil CO2 flux data acquired by the continuous geochemical network installed in the summit and peripheral areas of Stromboli Island have allowed us to thoroughly investigate and to model the plumbing system. This study analyzed 16 years of soil CO2 fluxes from the summit area, which showed a wide range of values (from 2000 to 85,000 g m− 2 day− 1). A set of discontinuous pCO2 data (ranging from 0.1 to 0.35 atm) from a dedicated thermal well (COA) drilled in the Stromboli village has been taken into account for the peripheral degassing evaluation. One of the major accomplishments of this study is the confirmation of the previous formulated geochemical model based on of the soil CO2 fluxes database and the recent effusive eruptions. The analysis of soil summit degassing data recorded at the summit STR02 station throughout the monitoring period (2000–2015) revealed that the log(CO2 flux) values conformed to a polimodal distribution with different mean values of CO2 fluxes being recorded for each sub-period during the different effusive eruptions. The three selected periods (2000–2004, 2005–2010, and 2011–2015) were characterized by considerable increases in soil CO2 degassing coinciding with the periods of effusive eruptions, indicating volatiles overpressure and disequilibrium of the volcanic system. Moreover, the CO2 output evaluations based on soil CO2 fluxes and pCO2 values of thermal waters (COA), have showed a long increasing trend both in the summit and peripheral areas. From 2007 to 2014, culminating in the last effusive eruption (August–November 2014).

[1]  S. Fagents,et al.  Pushing the Volcanic Explosivity Index to its limit and beyond: Constraints from exceptionally weak explosive eruptions at Kīlauea in 2008 , 2013 .

[2]  Piergiorgio Scarlato,et al.  High‐speed imaging of Strombolian explosions: The ejection velocity of pyroclasts , 2012 .

[3]  Maurizio Ripepe,et al.  Lava effusion rates from hand-held thermal infrared imagery: an example from the June 2003 effusive activity at Stromboli , 2005 .

[4]  S. Inguaggiato,et al.  A simple method for the determination of dissolved gases in natural waters. An application to thermal waters from Vulcano Island. , 1998 .

[5]  B. Voight,et al.  Failure of volcano slopes , 1997 .

[6]  S. Inguaggiato,et al.  Dissolved helium isotope ratios in ground-waters: a new technique based on gas–water re-equilibration and its application to Stromboli volcanic system , 2004 .

[7]  J. Taddeucci,et al.  The 15 March 2007 paroxysm of Stromboli: video-image analysis, and textural and compositional features of the erupted deposit , 2013, Bulletin of Volcanology.

[8]  W. Evans,et al.  High CO2 emissions through porous media: transport mechanisms and implications for flux measurement and fractionation , 2001 .

[9]  M. Liotta,et al.  Fluid Geochemistry of Stromboli , 2008 .

[10]  D. Rothery,et al.  Effusion rate trends at Etna and Krafla and their implications for eruptive mechanisms , 2000 .

[11]  M. Ripepe,et al.  Volcano seismicity and ground deformation unveil the gravity-driven magma discharge dynamics of a volcanic eruption , 2015, Nature Communications.

[12]  T. Apuani,et al.  Numerical model of the Stromboli volcano (Italy) including the effect of magma pressure in the dyke system , 2009 .

[13]  A. Harris,et al.  Thermal observations of degassing open conduits and fumaroles at Stromboli and Vulcano using remotely sensed data , 1997 .

[14]  Clive Oppenheimer,et al.  Lava effusion – a slow fuse for paroxysms at Stromboli volcano? , 2011 .

[15]  Mauro Coltelli,et al.  2002–2003 Lava Flow Eruption of Stromboli: A Contribution to Understanding Lava Discharge Mechanisms Using Periodic Digital Photogrammetry Surveys , 2013 .

[16]  Giorgio Lacanna,et al.  Wideband acoustic records of explosive volcanic eruptions at Stromboli: New insights on the explosive process and the acoustic source , 2014 .

[17]  N. Casagli,et al.  Ground-based SAR interferometry for monitoring mass movements , 2004 .

[18]  G. Chiodini,et al.  Carbon dioxide diffuse degassing and estimation of heat release from volcanic and hydrothermal systems , 2005 .

[19]  M. Pompilio,et al.  Chapter 14 Stromboli volcano, Aeolian Islands (Italy): present eruptive activity and hazards , 2013 .

[20]  Hiroshi Shinohara,et al.  Excess degassing from volcanoes and its role on eruptive and intrusive activity , 2008 .

[21]  Massimo Orazi,et al.  The 7 September 2008 Vulcanian explosion at Stromboli volcano: Multiparametric characterization of the event and quantification of the ejecta , 2012 .

[22]  L. Brusca,et al.  Geochemical precursors of the activity of an open‐conduit volcano: The Stromboli 2002–2003 eruptive events , 2004 .

[23]  A. Sinclair.  Selection of threshold values in geochemical data using probability graphs , 1974 .

[24]  P. Zettwoog,et al.  Sulphur output and magma degassing budget of Stromboli volcano , 1994, Nature.

[25]  W. Giggenbach.  A simple method for the collection and analysis of volcanic gas samples , 1975 .

[26]  L. Brusca,et al.  Total CO2 output from Ischia Island volcano (Italy) , 2005 .

[27]  P. Tommasi,et al.  The evolution of the Sciara del Fuoco subaerial slope during the 2007 Stromboli eruption: Relation between deformation processes and effusive activity , 2009 .

[28]  A. Bertagnini,et al.  Volcanology and Magma Geochemistry of the Present‐Day Activity: Constraints on the Feeding System , 2008 .

[29]  M. Ripepe.  Evidence for gas influence on volcanic seismic signals recorded at Stromboli , 1996 .

[30]  C. Cardellini,et al.  Comparison of carbon dioxide emissions with fluid upflow, chemistry, and geologic structures at the Rotorua geothermal system, New Zealand , 2006 .

[31]  A. Bertagnini,et al.  Subaqueous density flow processes and deposits of an island volcano landslide (Stromboli Island, Italy) , 2009 .

[32]  H. Rymer,et al.  New geophysical insight into the dynamics of Stromboli volcano (Italy) , 2012 .

[33]  L. Francalanci,et al.  Sr isotope evidence for short magma residence time for the 20th century activity at Stromboli volcano, Italy , 1999 .

[34]  A. Pozzo,et al.  Isotopic, chemical and dissolved gas constraints on spring water from Popocatepetl volcano (Mexico): evidence of gas-water interaction between magmatic component and shallow fluids , 2005 .

[35]  F. D'amore,et al.  Chemical and isotopical characterisation of fluid manifestations of Ischia Island (Italy) , 2000 .

[36]  A. Harris,et al.  The 2007 Stromboli eruption: event chronology and effusion rates using thermal infrared data , 2010 .

[37]  A. McGonigle,et al.  H2S fluxes from Mt. Etna, Stromboli, and Vulcano (Italy) and implications for the sulfur budget at volcanoes , 2005 .

[38]  B. Raco,et al.  Diffuse emission of CO2 from the Fossa crater, Vulcano Island (Italy) , 1996 .

[39]  Paolo Papale,et al.  The 2007 eruption of Stromboli volcano: Insights from real-time measurement of the volcanic gas plume CO2/SO2 ratio , 2009 .

[40]  I. S. Diliberto,et al.  The role of the aquifer in soil CO 2 degassing in volcanic peripheral areas: A case study of Stromboli Island (Italy) , 2017 .

[41]  Salvatore Inguaggiato,et al.  Long-time variation of soil CO2 fluxes at the summit crater of Vulcano (Italy) , 2012, Bulletin of Volcanology.

[42]  P. Madonia,et al.  The 2002–2003 eruption of Stromboli (Italy): Evaluation of the volcanic activity by means of continuous monitoring of soil temperature, CO2 flux, and meteorological parameters , 2004 .

[43]  Luca D'Auria,et al.  Changes in the VLP seismic source during the 2007 Stromboli eruption , 2009 .

[44]  E. Parfitt,et al.  A discussion of the mechanisms of explosive basaltic eruptions , 2004 .

[45]  M. Ripepe,et al.  Dynamics of Strombolian explosions: Inferences from field and laboratory studies of erupted bombs from Stromboli volcano , 2014 .

[46]  C. Federico,et al.  Geochemical monitoring of the 2002–2003 eruption at Stromboli volcano (Italy): precursory changes in the carbon and helium isotopic composition of fumarole gases and thermal waters , 2005 .

[47]  N. Casagli,et al.  Deformation of Stromboli Volcano (Italy) during the 2007 eruption revealed by radar interferometry, numerical modelling and structural geological field data , 2009 .

[48]  Takeshi Ohba,et al.  Monitoring active volcanoes: The geochemical approach , 2011 .

[49]  L. Francalanci,et al.  The volcanic activity of Stromboli in the 1906–1998 AD period: mineralogical, geochemical and isotope data relevant to the understanding of the plumbing system , 2004 .

[50]  Daniele Andronico,et al.  Linked frequency and intensity of persistent volcanic activity at Stromboli (Italy) , 2013 .

[51]  N. Casagli,et al.  Review of ten years of volcano deformations recorded by the ground-based InSAR monitoring system at Stromboli volcano: a tool to mitigate volcano flank dynamics and intense volcanic activity , 2014 .

[52]  P. Madonia,et al.  Variations of Soil Temperature, CO2 Flux, and Meteorological Parameters , 2013 .

[53]  Klemen Zaksek,et al.  Satellite and Ground Based Thermal Observation of the 2014 Effusive Eruption at Stromboli Volcano , 2015, Remote. Sens..

[54]  J. Bourquin,et al.  Geochemical and isotopic characterization of volcanic and geothermal fluids discharged from the Ecuadorian volcanic arc , 2009 .

[55]  Luigi Marini,et al.  Soil CO2 flux measurements in volcanic and geothermal areas , 1998 .

[56]  Claude Lepeltier.  A simplified statistical treatment of geochemical data by graphical representation , 1969 .

[57]  D. Rouwet,et al.  Geochemical Prediction of the 2002–2003 Stromboli Eruption From Variations in CO2 and Rn Emissions and in Helium and Carbon Isotopes , 2008 .

[58]  C. Cardellini,et al.  Application of stochastic simulation to CO2 flux from soil: Mapping and quantification of gas release , 2003 .

[59]  Mike Burton,et al.  Magmatic Gas Composition Reveals the Source Depth of Slug-Driven Strombolian Explosive Activity , 2007, Science.

[60]  R. A. Corsaro,et al.  Petrologic monitoring of glasses in the pyroclastites erupted in February 2004 by the Stromboli Volcano, Aeolian Islands, Southern Italy , 2005 .

[61]  H. D. Granados,et al.  CO2 output discharged from Stromboli Island (Italy) , 2013 .

[62]  Paolo Baldi,et al.  High precision photogrammetry for monitoring the evolution of the NW flank of Stromboli volcano during and after the 2002–2003 eruption , 2008 .

[63]  D. Rouwet,et al.  CO2 and He degassing at El Chichón volcano, Chiapas, Mexico: gas flux, origin and relationship with local and regional tectonics , 2011 .

[64]  T. Caltabiano,et al.  Major eruptive style changes induced by structural modifications of a shallow conduit system: the 2007–2012 Stromboli case , 2014, Bulletin of Volcanology.

[65]  H. Gonnermann,et al.  Basaltic explosive volcanism: Constraints from deposits and models , 2008 .

[66]  A. Bertagnini,et al.  Paroxysmal activity at Stromboli: lessons from the past , 2011 .

[67]  D. Rouwet,et al.  Geochemical evaluation of observed changes in volcanic activity during the 2007 eruption at Stromboli (Italy) , 2009 .

[68]  Dmitri Rouwet,et al.  Total CO2 output from Vulcano island (Aeolian Islands, Italy) , 2012 .

[69]  Daniele Andronico,et al.  Characterizing high energy explosive eruptions at Stromboli volcano using multidisciplinary data: An example from the 9 January 2005 explosion , 2008 .

[70]  L. Francalanci,et al.  Chapter 13 Eruptive, volcano-tectonic and magmatic history of the Stromboli volcano (north-eastern Aeolian archipelago) , 2013 .

[71]  Clayton V. Deutsch,et al.  GSLIB: Geostatistical Software Library and User's Guide , 1993 .

[72]  M. Rosi,et al.  The December 2002–July 2003 effusive event at Stromboli volcano, Italy: Insights into the shallow plumbing system by petrochemical studies , 2006 .

[73]  L. Civetta,et al.  Magma dynamics during the 2007 Stromboli eruption (Aeolian Islands, Italy): Mineralogical, geochemical and isotopic data , 2009 .

[74]  Salvatore Gambino,et al.  Insight on recent Stromboli eruption inferred from terrestrial and satellite ground deformation measurements , 2009 .

[75]  P. Nehlig,et al.  Tephrochronology of the Mont-Dore volcanic Massif (Massif Central, France): new 40Ar/39Ar constraints on the Late Pliocene and Early Pleistocene activity , 2014, Bulletin of Volcanology.

[76]  Maurizio Ripepe,et al.  A case history of paroxysmal explosion at Stromboli: Timing and dynamics of the April 5, 2003 event , 2006 .

[77]  E. Boschi,et al.  Reconstruction of the eruptive activity on the NE sector of Stromboli volcano: timing of flank eruptions since 15 ka , 2011 .

[78]  S. Self,et al.  The volcanic explosivity index (VEI) an estimate of explosive magnitude for historical volcanism , 1982 .

[79]  Lionel Wilson,et al.  Mechanisms and dynamics of strombolian activity , 1976, Journal of the Geological Society.

[80]  M. Ripepe,et al.  The 15 March 2007 explosive crisis at Stromboli volcano, Italy: Assessing physical parameters through a multidisciplinary approach , 2011 .

[81]  N. Bobrowski,et al.  Geochemical evidence of the renewal of volcanic activity inferred from CO2 soil and SO2 plume fluxes: the 2007 Stromboli eruption (Italy) , 2011 .

[82]  M. Burton,et al.  First observational evidence for the CO 2 -driven origin of Stromboli's major explosions , 2011 .

[83]  A. Harris,et al.  Chronology and complex volcanic processes during the 2002-2003 flank eruption at Stromboli volcano (Italy) reconstructed from direct observations and surveys with a handheld thermal camera , 2005, Journal of Geophysical Research: Solid Earth.

[84]  Enzo Boschi,et al.  Dynamics of the shallow plumbing system investigated from borehole strainmeters and cameras during the 15 March, 2007 Vulcanian paroxysm at Stromboli volcano , 2012 .

[85]  Marco Neri,et al.  Structural features of the 2007 Stromboli eruption , 2009 .

[86]  Maurizio Ripepe,et al.  Strombolian explosive styles and source conditions: insights from thermal (FLIR) video , 2007 .

[87]  S. Inguaggiato,et al.  Dissolved CO2 in natural waters: development of an automated monitoring system and first application to Stromboli volcano (Italy) , 2011 .

[88]  S. Blake,et al.  Modelling the dynamics and thermodynamics of volcanic degassing , 1998 .

[89]  Yehuda Bock,et al.  The shallow plumbing system of Stromboli Island as imaged from 1 Hz instantaneous GPS positions , 2004 .

[90]  D. Patanè,et al.  Dynamics of the December 2002 flank failure and tsunami at Stromboli volcano inferred by volcanological and geophysical observations , 2003 .

[91]  Bruce F. Houghton,et al.  Physical mingling of magma and complex eruption dynamics in the shallow conduit at Stromboli volcano, Italy , 2005 .

[92]  M. Liuzzo,et al.  The 2014 effusive eruption at Stromboli volcano (Italy): Inferences from soil CO2 flux and 3He/4He ratio in thermal waters , 2015 .

[93]  A. Bertagnini,et al.  Triggering mechanism at the origin of paroxysms at Stromboli (Aeolian Archipelago, Italy): The 5 April 2003 eruption , 2005 .

[94]  S. Vergniolle,et al.  Strombolian explosions 1. A large bubble breaking at the surface of a lava , 1996 .

[95]  Mike Burton,et al.  SO2 flux from Stromboli during the 2007 eruption: Results from the FLAME network and traverse measurements , 2009 .

[96]  Giuseppe Puglisi,et al.  New integrated geodetic monitoring system at Stromboli volcano (Italy) , 2005 .

[97]  Marco Liuzzo,et al.  A model of degassing for Stromboli volcano , 2010 .

[98]  P. Landi,et al.  The 2009 paroxysmal explosions at Stromboli (Italy): magma mixing and eruption dynamics , 2011 .

[99]  A. Bertagnini,et al.  Recycling and “re-hydration” of degassed magma inducing transient dissolution/crystallization events at Stromboli (Italy) , 2008 .