Near the beginning of the book, there was a storm. This storm caused their boat to be wrecked onto this island. The storm was so bad, the kids could not find any remnants of it. Count Olaf decided to go straight into the storm.
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