For example, was observed formation of a regular crop circle patterns directly above a metal underground tank - serve as a very good current conductor - underground lightning rod.
Kwa mfano, mara aliona malezi ya aa mara kwa mara mwelekeo wa mzunguko wa mazao moja kwa moja juu tank chuma chini ya ardhi - kutumika kama conductor nzuri sana sasa - chini ya ardhi umeme fimbo.