EARTH’S MAGNETIC FIELD: OUR COSMIC SHIELD The Earth's magnetic field, also known as the geomagnetic field, extends from deep within the planet to the point where it meets solar radiation. Its strength ranges between 25 to 65 microtesla (0.25 to 0.65 gauss). Interestingly, the magnetic poles are tilted about ten degrees from Earth’s rotational axis and shift gradually over time due to the movement of molten iron alloys in the outer core. Despite this movement, the compass has remained a reliable