El magnetic field yePasi inotidzivirira zuva rega rega kubva kune zvimedu zvakabhadhariswa uye nemwaranzi kubva kumwenje wezuva. Iyi nhovo inogadzirwa nekukurumidza kufamba kwemahombekombe akakura esimbi yesimbi alloy mune yekunze musimboti wepasi. Kuchengeta izvi campo rinobva, yechinyakare modhi yaiti iyo yepasi pevhu yakanga yatonhorera angangoita 3000 madhigirii mumakore ekupedzisira e4,3 bhiriyoni. Izvi zvaive pasina kuverenga simba reMwedzi.
Iyo yechinyakare modhi yemagineti munda kuumbwa kweiyo Pasi zvakamutsa kushamisika kukuru. Kuti geodynamics iyi ishande, pasi raifanirwa kunge rakanyungudika zvachose makore mabhiriyoni mana apfuura, uye pfumo rayo raifanira kutonhorera zvishoma nezvishoma kusvika pamadhigirii mazana matanhatu neshanu. Razvino basa rekuenzanisira kutanga kwekushanduka kwetembiricha yemukati yepasi, uye geochemistry pane iko kuumbika kwe carbswakedudes uye mabharanzi ekare anopesana nekutonhora uku. Kana tembiricha dzakadai dzakasarudzika, vaongorori vanopa imwe sosi yesimba muchidzidzo chino.
Chikwata chevaongorori chinoratidza kuti tembiricha yadonha nemadhigirii mazana matatu chete. Chiito cheiyo Luna, yakakanganikwa kusvika zvino, yaizobhadhara uyu musiyano wekuchengetedza geodynamics ichishanda.
La Tland inotora chimiro chakatsetseka, chinotenderedza akabatana anotenderera achitenderera matanda, uye jasi rayo rakaremara nekukanganiswa nemafungu anokonzerwa nemwedzi. Vatsvakurudzi vakaratidza kuti izvi zvinogona kuramba zvichikurudzira mafambiro ealloy e hierro mvura iyo inoumba musimboti wekunze, uyezve inoburitsa simba renyika renyika.
Uyu simba inokwana kuburitsa iyo magnetic field ye Pasi kuti neMwedzi, inogadzirisa gangaidzo hombe remhando yechinyakare. Mhedzisiro yakadaro yemakomba ekudhonza pamagineti epasi yakave yakanyorwa zvakawandisa kuburikidza nemataneti maviri echisikigo, ayo eJupiter uye eayo mazhinji exoplanets.
Sezvo kana iyo kutenderera yepasi yakatenderedza axis yayo, kana kutenderera kweiyi axis, kana kutenderera kweMwedzi hakuna kujairika, simba ravo rakaunganidzwa pamafambiro ari munyukireya haana kugadzikana uye anogona kukonzera kuti geodynamics ichinje. Ichi chiitiko chinoita kuti zvikwanise kutsanangura mamwe mapuropa e kupisa nechepakati pekunze uye pamuganhu wayo nepasi. Nhoroondo, izvi zvinogona kutungamira kune zvinonyungudika zvinyoro mune yakadzika mantle uye pakupedzisira zviitiko zvikuru zvegomo pamusoro penzvimbo Pasi. Iyi modhi nyowani inoratidza kuti simba re Luna Pasi pano inodarika nyaya yakapusa yemafungu.