There would presumably be a partner for the third pole,
since magnetic poles always come in pairs, he adds.
Not exact matches
The
poles have never completely reversed
since, but for the past 160 years, the strength of the
magnetic field has been decreasing at an alarming rate.
Since north
poles are attracted to south
poles, the «north» arrow on your compass actually points toward the earth's south
magnetic pole, which is the one up north.
That was surprising,
since aside from their polarity, the properties of a pair of
magnetic poles should be exactly the same, leading to identical radio emissions, says Hankins.
And
since both sets of rocks contained palaeo -
magnetic evidence of the north and south
poles» periodical reversals, researchers were able to calibrate the evidence and arrive at an accurate calendar of changing climate conditions, every 405 millennia.