A meandering line circling the globe where a magnetic compass needle has zero dip, meaning the planetary magnetic field lines run exactly parallel to the Earth's surface. It does not align perfectly with the geographic equator and shifts constantly due to changes in the Earth's core. Understanding this boundary is necessary for geomagnetically induced current modeling in long-distance power transmission networks.
Heard on the job
The solar storm modeling shows minimal induced currents near the magnetic equator compared to the northern transmission corridors.
Also heard as
- aclinic line