What is a ‘dirty thunderstorm’?
The term ‘dirty thunderstorm’ means lightning in an eruption cloud from a volcano.
Sakurajima is the only volcano that has frequent lightning in daily eruptions.
“In a normal thunderstorm ice crystals collide and generate electric charges, which results in lightning. In an eruption cloud ash particles collide instead of ice crystals.”
CAUSES
Study in the journal Science indicated that electrical charges are generated when rock fragments, ash, and ice particles in a volcanic plume collide and produce static charges, just as ice particles collide in regular thunderstorms.
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