Maginito Pole: Kodi mzati inversion ndi zotheka?

mizati maginito ya Earth - ndi chigawo chimodzi cha geomagnetic munda dziko zikuchitika chifukwa kayendedwe ka otaya osungunula chitsulo ndi faifi tambala padziko pachimake chapakati olimba chifukwa mafunde mu ionosphere ndi, anomalies m'dera kutumphuka . mizati ena maginito anazindikira mfundo zomwe munda Geomagnetic pansi kumathandiza kupeza ngodya zabwino ufulu padziko lapansili. Okwana pali mitengo iwiri - kumpoto ndi kum'mwera, zimene siziri antipodal chifukwa asymmetry za kuthengo.

Maginito mzati mu Chigawo cha kumpoto kwenikweni ake ndi kum'mwera, chifukwa Ndi malo mizere m'munda kupita pansi padziko. A "zoona" Pole North ndi kum'mwera, kumene mzere kuchokera pansi pa kunja.

Amaganiza kuti kuli zake maginito anthu amadziwa kwa nthawi yaitali. Kale mu 220 BC ku China zinalengedwa ndi chithunzi choyamba kampasi, amene amatchedwa "tebulo wakumwamba." Mpheroyi supuni yaing'ono onsewo mbale pakati zamkuwa. Ndondomeko enieni kumene kumpoto ndi kumwera mizati maginito ya Dziko Lapansi, akhala anaika mu mmasate ndi makumi anai a XIX atumwi. Mu 1831, abale Ross anatsimikiza kuti kumpoto ndi pa madigiri 70 Mphindi 5 kumpoto kumpoto ndi madigiri 96 Mphindi 46 kumadzulo longitude. A kum'mwera maginito mzati ali ndondomeko izi: 75 madigiri Mphindi 20 kum'mwera kumpoto ndi madigiri 132 Mphindi 20 East longitude (unakhazikitsidwa mu chaka 1841). Kumayambiriro kwa zaka za m'ma XXI malo mfundo zimenezi zasintha kwambiri. Kumpoto maginito a dziko lapansi "anasiya" mzati ku mfundo mwachindunji mu 1831 kuti 1340 Km, ndi kum'mwera - mpaka 1349 (pa malo 1841, motero). The njira yodutsamo wa mfundo zimenezi si liniya - iwo angakhoze kupanga ndi kanthu kenakake.

M'zaka zaposachedwapa, asayansi amanena kuti kusamutsidwa zake Dziko Lapansi maginito zayamba zolimira. Ena amanena izi chakuti mu nyengo ya 1969-1970. zinachitika geomagnetic kulumpha, amene kwambiri anasintha magawo a m'munda wa dzikoli. kusintha kwinanso kwa ndondomeko malo zinachitikadi mchikakamizo cha zodabwitsa za 1978 ndi 1991-1992. Komanso, maginito mzati zimakhudza okwana mphamvu kumunda, limene lidagwa kukhala wofunika osachepera pa atumwi wotsiriza. Pankhani imeneyi, pali mfundo za zosiyana zotheka zake, kumene iwo adzakhala swapped, kuchititsa chiwonongeko ambiri ndi masoka achilengedwe. Pa zaka miliyoni zapitazi, kusintha kwa mizati alipire 20 zina zomwe yotsirizira anagwa ku nthawi za miliyoni 0,8. Zaka zapitazo. Komabe, pamene izi zikuchitika nthawi yotsatira, zoona palibe amene angathe, chifukwa zochitika za m'mbuyomo anali osasamba.

Phunzirolo lili mkati, mu 1993, anachita ndi miyala kuchokera pansi pa Pacific Ocean, chinapezeka kuti pambuyo zitasintha maginito loyamba amalandira mlandu pazipita, ndiye mphamvu yake pang'onopang'ono eroding. Mwina izi ndi mtundu wa njira chilengedwe kumapangitsanso chitetezo cha moyo pa dziko ku cheza dziko. Popanda Earth athu adzakhala wopanda moyo, ngati Mars, komwe munda ofooka kwambiri, kapena Venus, pamene ambirife ayi.