qhov twg magnetic sab qaum teb

Sib nqus sab qaum teb, yooj yim muab tso, yog cov kev taw qhia uas ib rab koob qhia txog lub ntiaj teb magnetic teb. Qhov tshwm sim no tshwm sim vim muaj cov hlau nplaum loj loj tob hauv lub ntiaj teb lub hauv paus. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov chaw ntawm cov hlau nplaum sab qaum teb tsis raug kho thiab txawv me ntsis raws sijhawm.

Rau cov neeg tsim khoom thiab cov chaw tsim khoom ntawm cov khoom sib nqus, kev nkag siab qhov chaw thiab txav ntawm cov hlau nplaum sab qaum teb yog qhov tseem ceeb. Qhov tsis raug ntawm kev tsim lossis kev xam yuav ua rau cov khoom tsis ua haujlwm kom raug lossis muab cov ntawv nyeem tsis raug.

Txhawm rau kom paub meej meej hauv kev tsim cov khoom sib nqus, nws yog ib qho tsim nyog rau cov neeg tsim qauv los hloov kho lawv cov kev paub ntawm qhov chaw thiab kev txav ntawm cov hlau nplaum sab qaum teb. Qhov no suav nrog kev tshuaj xyuas tsis tu ncua los ntawm cov koom haum xws li World Magnetic Model (WMM) thiab British Geological Survey (BGS).