Magnetic Pole: Ingabe kombhala isigxobo kungenzeka?

izingongolo Magnetic Zomhlaba - isakhi we kazibuthe omhlaba ensimini iplanethi ezenzeka ngenxa ukunyakaza oncibilikisiwe yensimbi ukugeleza futhi nickel emhlabeni emaphakathi core okuqinile ngenxa Imisinga ionosphere, lendawo anomalies uqweqwe . nezinye izigxobo kazibuthe neyaziwayo kunini lapho kungashiwo khona ensimini Geomagnetic ngaphansi engeli ilungelo ebusweni iplanethi. Sekukonke kukhona izigxobo ezimbili - nasenyakatho naseningizimu, engewona nokho antipodal ngenxa asymmetry yasendle.

isigxobo Magnetic e Nenkabazwe empeleni yayo iyona eningizimu, ngoba Kuyinto endaweni okuhlangana khona imizila leyo nsimu hamba ngaphansi kwamanzi. A "iqiniso" North Pole kuyinto eningizimu, lapho umugqa kusukela ngaphansi kwamanzi ngaphandle.

Kusolwa ukuthi khona zezingongolo kazibuthe lesintu uyazi isikhathi eside. Kakade 220 BC eChina ashiwo isithombe lokuqala ikhampasi, okuthiwa "etafuleni zasezulwini." Lalinama spoon elincane ligijima amapuleti phakathi ngethusi. Ukuxhumanisa ngqo lapho ukusuka enyakatho uye eningizimu izingongolo kazibuthe Zomhlaba, isifakiwe namathathu banesifo esibi futhi forties kwekhulu XIX. Ngo-1831, abafowethu Ross sinqume ukuthi pole enyakatho isezingeni degrees 70 imizuzu 5 enyakatho nenkabazwe futhi 96 degrees imizuzu 46 entshonalanga ye-longitude. A eningizimu pole magnetic has izixhumanisi ezilandelayo: degrees 75 imizuzu engu-20 eningizimu-latitude 132 degrees 20 amaminithi longitude East (esasungulwa ngonyaka 1841). Ekuqaleni ngekhulu xxi indawo la maphuzu ishintshile kakhulu. I enyakatho magnetic zomhlaba "elivulekile ngomqondo" isigxobo kusukela iphuzu echaziwe ngo-1831 kuya ku 1340 km, futhi eningizimu - ukuze 1349 (indawo ku 1841, ngokulandelana). I trajectory la maphuzu akuyona komugqa - zingenza futhi isenzo ukubuya.

Eminyakeni yamuva, ososayensi baye baphawula ukuthi displacement izigxobo eMhlabeni magnetic kakhulu kuye embili ngesivinini. Abanye bathi lokhu kubangwa yokuthi esikhathini 1969-1970. iphutha gxuma kazibuthe omhlaba, okuyinto kakhulu ushintshe nemingcele zasendle nazo kulo mhlaba. ukulungiswa okuqhubekayo izixhumanisi indawo kwenziwa ngaphansi kwethonya uthuthumele ka 1978 kanye 1991-1992. Futhi, pole magnetic kuthonywa amandla emkhakheni inani, okuyinto liwela inani eliphansi kule minyaka eyikhulu edlule. Kule ndaba, kukhona iziphakamiso ukushintsha kungenzeka zezingongolo, lapho bayobizwa ushintshanisiwe, okubangela ekubhubhiseni eziningi nezinhlekelele zemvelo. Kuleminyaka kwezigidi ezimbili iminyaka, ushintsho izigxobo labetibambile izikhathi ezingaba ngu-20, lapho yokugcina bawela Enkathini ecishe ibe izigidi ezingu 0.8. Eminyakeni eminingi edlule. Nokho, uma lokhu kwenzeka ngesikhathi esilandelayo, ukubikezela ngokunembile akekho, ngoba yonke imicimbi kwangaphambili akuzange okungajwayelekile.

Phakathi nesifundo, ngo-1993, olwenziwa ne amatshe kusuka phansi elwandle eliKhulu iPacific, kwatholakala ukuthi ngemva kubuyekezwe kazibuthe kuqala uthola icala esiphezulu ke amandla kwalo kancane kancane zicekela phansi. Mhlawumbe lena yiyona ndlela ezinye uhlobo indlela jikelele ukuthuthukisa nokuvikela ukuphila emhlabeni kusukela cosmic ngemisebe. Ngaphandle-ke, i-Earth wethu kungaba angaphili, njengothuli Mars, lapho insimu enganamandla kakhulu, noma Venus, lapho ngokuvamile akuyona.