Volcano photos

NatGeo has a slideshow of Volcanic eruptions with lightening. 

This one is in Chile

Photograph by Carlos Gutierrez, Reuters

There are at least two types of volcanic lightning, the new radio-mapping study found. One occurs at the mouth of the volcano, and the other—as shown over Chile's Puyehue-Cordón Caulle volcano complex in 2011—electrifies the heights of the plume, possibly as rising water becomes a mix of droplets and ice-coated ash particles.
The water and frozen-ash particles, said McNutt—who's found volcanic plumes to be surprisingly water rich—rub against each other. As with shuffling shoes on carpet, the contact produces static charges.