Also, the needle starts to point up or down when getting closer to the poles, because of the so-called magnetic inclination.
From the en.wikipedia.org
Magnetic dip or magnetic inclination is the angle made by a compass needle with the horizontal at any point on the Earth's surface.
From the en.wikipedia.org
In the late 1590s Henry Briggs, a professor of geometry at Gresham College in London, had published a table of magnetic inclination with latitude for the earth.
From the en.wikipedia.org
Magnetism is a vector and so magnetic field variation is made up of palaeodirectional measurements of magnetic declination and magnetic inclination and palaeointensity measurements.
From the en.wikipedia.org
Because the Earth's magnetic field's inclination and intensity vary at different latitudes, compasses are often balanced during manufacture.
From the en.wikipedia.org
It also reacts to the inclination and the local field strength of the Earth's magnetic field.
From the sciencedaily.com
You can tell this is what she was born to do and her performances are magnetic because of that heartfelt, natural inclination to sing.
From the tunedin.blogs.time.com
These crystals are thought to be involved in magnetoreception, the ability to sense the polarity or the inclination of the Earth's magnetic field, and to be involved in navigation.
From the en.wikipedia.org
While reliable in steady level flight it can give confusing indications when turning, climbing, descending, or accelerating due to the inclination of the Earth's magnetic field.