Cygnus A Stellar Mass Black Hole. Artist's illustration shows the black hole drawing mass from a companion blue star. The material forms a disc around the black hole before falling into it or being ejected by powerful jets.
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 environm