It's not very often, because in high latitudes, where the figures appear, occurs annually on average to 2-3 lightning hits per km2, less than half may be outside growing season, so hit the enclosure into the field when there is nothing more growing, and so each such object will wait to be displayed again at minimum 10-20 years or longer, maybe 100. But as already mentioned, if there does not appear simultaneously in their vicinity a large regular pattern, such an event will take place entirely without any publicity.
Ni si sana Mara nyingi, kwa sababu ya juu katika latitudo, ambapo takwimu Onekana, Hupatikana Kila mwaka kwa wastani hii 2-3 umeme hits per km2, Chini ya nusu inaweza kuwa nje msimu wa kupanda, hivyo hit enclosure katika shamba Wakati kuna kitu zaidi kuongezeka, na hivyo kitanzi kila kusubiri kitu kavu ili kuonyeshwa tena katika kiwango cha chini ya miaka 10 hadi 20 au zaidi, labda 100 Lakini kama tayari kutajwa, kama kuna haina kutokea katika maeneo ya jirani yao wakati huo huo mara kwa mara mfano kubwa, kavu Tukio hilo utafanyika Kabisa bila utangazaji yoyote.