EGU2020-3163
https://doi.org/10.5194/egusphere-egu2020-3163
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Modelling Fluid Migration and Seismicity in an Active Volcano: A Case Study of Campi Flegrei Caldera, Southern Italy

Waheed Gbenga Akande1,2, Quan Gan1, David G. Cornwell1, and Luca De Siena1,3
Waheed Gbenga Akande et al.
  • 1University of Aberdeen, Scotland, United Kingdom (waheed.akande@abdn.ac.uk)
  • 2Federal University of Technology, Minna, Nigeria (waheed.akande@futminna.edu.ng)
  • 3Institute of Geosciences, Johannes Gutenberg University, Mainz, Germany

Several observables from geological, geophysical and geochemical studies (e.g., seismic velocities, seismic amplitudes/attenuation, isotopic ratios, and gas composition from fumaroles) have indicated that activities at active volcanoes change over different time scales. We have modelled the cause of this spatiotemporal evolution of deformation and seismicity at Campi Flegrei caldera (southern Italy) as two high coda wave attenuation anomalies (at ~ 1 km and ~2-3 km, respectively) separated by ca 0.5-km-thick low seismic attenuation layer “caprock”, which acts as a major blocking interface for the uprising hot magmatic fluids. We have used these observations along with rock physics data as constraints to conduct fluid flow simulation studies to gain more insights into how this active volcano works. We adopt a coupled modelling approach using mechanical (deformation) and fluid low simulators (TOUGH2-FLAC3D) to simulate seismic slips in the caldera’s computational domain both in isothermal and non-isothermal modes. The method allows us to investigate the roles of both hydromechanical and thermal effects of fluid injections in triggering seismicity at the caldera. The magnitudes of seismicity generated are comparable to the field observations and records of the major seismicity for the caldera in the 1980s.

How to cite: Akande, W. G., Gan, Q., Cornwell, D. G., and De Siena, L.: Modelling Fluid Migration and Seismicity in an Active Volcano: A Case Study of Campi Flegrei Caldera, Southern Italy, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-3163, https://doi.org/10.5194/egusphere-egu2020-3163, 2020

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Presentation version 1 – uploaded on 03 May 2020
  • AC1: Comment on EGU2020-3163, Waheed Akande, 07 May 2020

    Constructive comments and contributions from the session attendees are welcome to improve this work. 

    Thank you very much for giving me the opportunity to present this work at EGU2020.