The Physics of the Plasma Universe by Anthony Peratt describes magma as a plasma, a medium containing moving charges. So we should expect volcanoes not only to exhibit electrical behavior but to have that behavior connected with the larger plasma environment, that is, to be elements in a larger electrical circuit.
Breathtaking!...."I looked, and I saw a windstorm coming out of the north - an immense cloud with flashing lightning and surrounded by a brilliant light. The center of the fire looked like glowing metal."Ez1:4