This photo was shot by someone else on the 3rd of May 2008 in Chile, the Chaitin volcano was considered dormant but this eruption after some 9,000 years of silence, blasted ash over 12 miles (19km) into the sky. According to the National Geographic the 'dirty thunderstorms' might be triggered when rock fragments, ash, and ice particles in the plume collide to produce static charges, similar to how ice particles collide and create a charge in regular thunderstorms.