The new picture roughly agrees with this, but suggests the area heated by the plume may be far more extensive than indicated by the seismic data.
It relies on what is termed magneto-telluric (MT) readings, which register subtle changes in the Earth's conductivity and magnetic fields.
These register differences in temperature and composition of the rock and fluids, as these change alter the conductivity of the crust.

Posted: 8:25:28 AM  

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