That were formed by electromagnetic field in iron sawdust, by one, two and six equivalent lightning discharges, conductors perpendicular to the ground, passing through the surface to the deep underground.
Kwamba walikuwa sumu na shamba umeme katika chuma machujo ya mbao, na moja, mbili na sita yanayovuja sawa umeme, conductors perpendicular ya ardhi, kupitia uso na chini ya ardhi kirefu.