Jordens magnetfelt: Forskelle mellem versioner

Langt de fleste ladede partikler som rammer [[jordens atmosfære]], gør det i det ringformede områder med ringcenter typisk 15–25° fra jordens magnetiske poler. (ikke jordens geografiske poler).<ref>[https://www.icelandontheweb.com/articles-on-iceland/nature/northern-lights icelandontheweb.com: Northern Lights – Aurora Borealis in Iceland, Land of the Sagas] Citat: "...Auroras can be seen in auroral belts that form 20–25 degrees around the geomagnetic poles, both the north and the south...", [https://web.archive.org/web/20190216152418/https://www.icelandontheweb.com/articles-on-iceland/nature/northern-lights/ backup]</ref><ref>[https://www.visittromso.no/en/Northern-lights-whereandwhen visittromso.no: Where and when can you see the Northern Lights?] Citat: "...The oval in the Northern Hemisphere, the Northern Lights Oval, is centred at around 65 °N with a width of around 10 degrees. The oval expands when Northern Lights activity is at its strongest...The Southern Lights (aurora australis) is the identical opposite of the Northern Lights and can be seen in an equivalent zone in the Southern Hemisphere...", [https://web.archive.org/web/20190726221641/https://www.visittromso.no/en/Northern-lights-whereandwhen backup]</ref> Se illustrationerne. De ladede partikler kommer mest fra [[Van Allen-bælterne]], når de slår ned i atmosfæren og bl.a. laver [[polarlys]] (fællesnavn for nordlys og sydlys). Grunden til at de ladede partikler mest kommer fra Van Allen-bælterne, skyldes Jordens magnetfelts afbøjning af de ladede partikler, hvoraf langt de fleste kommer fra [[solen]] via [[solvinden]]. I Van Allen-bælterne spiralerer de ladede partikler fra pol til pol.<ref name="NASA"/>