Classic "normal" one crop circle, similar to a pattern in magnetic fillings, created by electromagnetic effects (very precise circular shape -!!!!!), or joint operation of the mechanical effects of shock and pressure waves of lightning (also have a very precise circular shape).
Classic "kawaida" mmoja wa mazao mduara, Sawa na muundo magnetic katika fillings, unaotokana na madhara electromagnetic (sahihi sana mviringo sura -!), Au operesheni ya pamoja ya madhara mitambo ya mawimbi mshtuko na shinikizo la umeme (pia kuwa sahihi sana mviringo sura).