Numerical simulation and inversion of MT fields in the 3D electric conductivity model of the Vesuvius volcano

Possibilities for three-dimensional (3D) magnetotelluric (MT) sounding of local objects contained in the Earth’s crust are estimated in a case study of the magma chamber of the Vesuvius volcano. Stochastic inversion of the model MT data by the Markov Chain Monte Carlo (MCMC) method has shown that th...

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Bibliographic Details
Published in:Izvestiya. Physics of the solid earth 2011, Vol.47 (1), p.72-76
Main Author: Spichak, V. V.
Format: Article
Language:English
Subjects:
Conductivity
Earth and Environmental Science
Earth Sciences
Electric fields
Geophysics/Geodesy
Markov chains
Monte Carlo simulation
Numerical analysis
Simulation
Volcanoes
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Summary:Possibilities for three-dimensional (3D) magnetotelluric (MT) sounding of local objects contained in the Earth’s crust are estimated in a case study of the magma chamber of the Vesuvius volcano. Stochastic inversion of the model MT data by the Markov Chain Monte Carlo (MCMC) method has shown that the most efficient approach is not simultaneous but successive estimation of the geometry and the depth of the anomaly and the assessment of the conductivity distribution within the anomalous region. A zone of equivalence is revealed between the a priori estimate of the depth of the anomalous zone and the a posteriori distribution of electric conductivity within it. Based on the present estimation and previous results, an algorithm for determination of the parameters of local crustal anomaly is proposed.
ISSN:1069-3513
1555-6506
DOI:10.1134/S1069351311010125