corona effect is "Phenomenon of appearance of luminous violet glow around conductor due to ionization of air, producing hissing/cracking noise

seen from Poland

seen from United States
seen from United Kingdom

seen from United States
seen from Italy
seen from Uruguay
seen from United States

seen from T1
seen from Pakistan
seen from Poland

seen from T1
seen from China
seen from China
seen from France

seen from Canada

seen from Netherlands

seen from United States

seen from Sweden
seen from Malaysia

seen from United States
corona effect is "Phenomenon of appearance of luminous violet glow around conductor due to ionization of air, producing hissing/cracking noise