Magnetic iyakacin duniya: Shin iyakacin duniya inversion aka yiwu?

Magnetic sandunan na Duniya - wani bangare ne na geomagnetic filin duniya da ke faruwa saboda da motsi na zubi baƙin ƙarfe kwarara da kuma nickel a kusa da tsakiyar m core saboda igiyoyin a cikin ionosphere, gida anomalies ɓawon burodi da sauran Magnetic sandunan gane batu a wanda. Geomagnetic filin karkashin dama kusassari da surface na duniya. A total akwai biyu dogayen sanda - arewa da kuma kudu, wanda ba antipodal saboda da jeri na bangaren na filin.

Magnetic iyakacin duniya a arewacin yammancin duniya da asalinta ne m, saboda Shi ne wurin da filin Lines tafi a karkashin surface. A "gaskiya" Arewa iyakacin duniya shi ne a kudancin kasar, inda line daga kasa tabbata daga.

An zaci cewa wanzuwar Magnetic sandunan da mutãne sani na dogon lokaci. Tuni a cikin 220 BC a China aka yi da hoton farko na kamfas, da ake kira "teburi sama." Yana kunshi wani kananan cokali juyawa tsakiya faranti na tagulla. A daidai tsarawa daga inda arewa da kuma kudu Magnetic sandunan na Duniya, da aka shigar a cikin thirties da forties na XIX karni. A 1831, 'yan'uwa Ross m cewa arewa iyakacin duniya shi ne a 70 digiri 5 da minti arewa latitud da kuma 96 digiri 46 minutes yamma longitude. A kudu Magnetic iyakacin duniya yana da wadannan tsarawa: 75 digiri 20 minutes kudu latitud da 132 digiri 20 minutes Gabas longitude (kafa a 1841 shekara). A farkon karni na XXI da wuri daga wadannan maki ya canza muhimmanci. Magnetic arewa na duniya "bar" iyakacin duniya daga batu a kayyade a 1831 zuwa 1340 km, da kuma kudu - to 1349 (a wuri a cikin 1841, bi da bi). A yanayin da wadannan maki ba mikakke - za su iya yin da kuma dawowar mataki.

A cikin 'yan shekaru, masana kimiyya sun lura da cewa, korar da Duniya ta Magnetic sandunan ma kara. Wasu sanyã wannan gaskiyar cewa, a cikin tsawon 1969-1970. ya faru geomagnetic Jump, wanda muhimmanci canja da sigogi na filin na duniya. Bugu da ari gyara na wuri tsarawa da aka za'ayi a ƙarƙashin rinjayar tunkaro na 1978 da kuma 1991-1992. Har ila yau, Magnetic iyakacin duniya ne ya rinjayi jimlar filin ƙarfi, wanda ya fadi a wani m darajar a kan na karshe karni. A wannan batun, akwai shawarwari da wani yiwu sokewa da sandunan, inda za su iya swapped, haddasa yawa halaka da kuma bala'o'i. A cikin shekaru biyu da miliyan shekaru, wani canji na sandunan da aka gudanar domin game da 20 sau, wadda karshen fadi zuwa wani lokaci na game da 0.8 miliyan. Shekaru da suka wuce. Duk da haka, a lokacin da wannan zai faru a gaba, daidai hango ko hasashen babu wanda zai iya, saboda duk gabata events sun sababbu.

A lokacin binciken, a 1993, gudanar da kankara daga kasa daga cikin Pacific Ocean, an gano cewa, bayan da canjawar Magnetic filin farko obtains matsakaicin cajin, sa'an nan da iko ne a hankali eroding. Wata kila wannan shi ne wasu irin duniya inji don bunkasa kariya na rayuwa a duniya daga cosmic radiation. Ba tare da shi, mu Duniya zai zama wani m, kamar Mars, inda wani sosai rauni filin, ko Venus, inda shi kullum ba.