Transformer Explosion at Con Edison Plant

The video discusses an electrical explosion at LaGuardia Airport, highlighting the visual spectacle of the sky turning blue and green. Personal experiences and public reactions, including tweets about aliens, are shared. The NYPD confirmed it was a transformer explosion with no injuries or extraterrestrial activity. The event is described as an interesting phenomenon.

What was confirmed to be the cause of the explosion?

What phenomenon did the explosion create according to the discussion?