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Vrancea Seismic Zone As An Unstable Triple Junction: New Evidence From Observations And Numerical Modelling
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 9th Congress of the Balkan Geophysical Society, Nov 2017, Volume 2017, p.1 - 5
Abstract
To avoid shortcomings of the current models attempting to explain genesis of the Vrancea intermediate-depth earthquakes the alternative model of an unstable triple junction (VTJ) had been previously proposed mainly based on a speculative approach.
The paper deals with results of the latest research, including high-resolution seismic tomography obtained through the joint inversion of seismic and gravity data, and numerical modelling of the mantle convection that brings new evidence to support VTJ as a valid alternative for Vrancea intermediate-depth seismicity geodynamic setting.
Of a special interest proved to be the advanced numerical modelling run on a High Performance Computing Cluster own by Solid Earth Dynamics Department in the Institute of Geodynamics of the Romanian Academy that has demonstrated how a stable triple lithospheric contact may transform into an unstable triple junction under the influence of a thermal anomaly even in the absence of differences between the plates velocities.