Southern England has known crop circles sites. They are associated with weak weather fronts crossing the region.
High rate of crop circles appeared at Wiltshire and Hampshire. The importance of chalk soil, insulating, electrically charged soil from the subsoil chalk beneath.
Creation of crop circles are associated with luminous balls of light that are sometime colored and sometime pulsate. Red and orange tinted lights are most frequently seen, colors that correspond to the emission spectrum of atmospheric nitrogen and it’s oxides.
Radio frequency effects are sometime noted.
In August 1986 in mountain of Yamagata Japan and maintain diameter of circle was blasted into a pond , 20 tones of water wasted front the rice paddy and a period of severe television interference was associated with this event. Also a report of bright orange light of ball lighting was also reported.
Colors lights occasionally pulsating and with an audible hum are all authenticated.